Tools by month

236 tools, grouped by the month they were created.

#July 2026 (16 tools)

• yaml-to-json (about)
  Convert between YAML and JSON in either direction from a single paste, with a toggle to flip the direction and a ⇄ swap button that round-trips the output back into ...
• json-to-csv (about)
  Paste JSON — an array of objects, a single object, or NDJSON/JSON Lines — and watch it convert to CSV live as you type. Choose your delimiter (comma, semicolon, tab, ...
• awk-playground (about)
  Experiment with AWK programs in a live browser REPL: write pattern/action rules (plus BEGIN and END blocks), paste your input, set the `-F` field separator or `-v` variable assignments, and ...
• jq-playground (about)
  Run real jq filters against JSON directly in your browser, with live output as you edit the filter or the data. jq itself is compiled to WebAssembly, so everything stays ...
• sed-playground (about)
  Experiment with GNU sed scripts in a live browser REPL: type a sed expression, paste your input as stdin, toggle `-n` (quiet), `-E` (extended regex), or `-z` (null-data), and watch ...
• jsonpath-evaluator (about)
  Evaluate a JSONPath expression against any JSON and see the matched values, their normalized paths, or their RFC 6901 JSON Pointers update live as you type. Browse the JSON as ...
• cloud-ip-lookup (about)
  Look up which cloud provider, region, and service owns an IPv4 or IPv6 address, the way seligman's "Lookup Cloud IP" page does. Type an address and it matches against published ...
• melissa-api-playground (about)
  Test Melissa's Cloud data-quality Web Services — global address, personator, email, phone, name, IP, reverse geocode, and property lookups — using your own Melissa license key, which stays in your ...
• integer-explorer (about)
  Explore the mathematical properties of any whole number from 1 to a quadrillion as you type. See its prime factorization, divisors, totient, number-base representations, and whether it is prime, square, ...
• json2go (about)
  Paste any JSON and get inferred Go structs with json tags, gofmt-aligned columns, and reused named types for repeated shapes. Distinguishes ints from floats, adds pointers and omitempty for optional ...
• json2ts (about)
  Paste any JSON and get inferred TypeScript interfaces, type aliases, or Zod schemas in real time. Merges object shapes across array elements so partial keys become optional, names and reuses ...
• json-to-jsonl (about)
  Paste or drop a JSON array (or a single object) and get back newline-delimited JSON, one compact object per line. Optionally give a dotted path like `data.items` to explode a ...
• jsonl-parser (about)
  Parse NDJSON / JSONL and infer its schema entirely in the browser, reporting valid vs. invalid line counts and one row per top-level field. Flatten nested object keys into dotted ...
• jsonl-validator (about)
  Validate NDJSON / JSONL by checking that every non-blank line parses as a complete JSON value, with per-line error messages and offending-line snippets. Toggle whether each record must be an ...
• jsonl-viewer (about)
  Load NDJSON / JSONL by pasting text, dropping a file, or browsing, and explore each record in a table whose columns are the union of every top-level key. Filter records ...
• csv2jsonl (about)
  Paste or drop a CSV (or TSV) file to convert it into newline-delimited JSON, one object per row. Auto-detects the delimiter, honors an optional header row, and optionally infers numbers, ...

#June 2026 (12 tools)

• data-extractor (about)
  Pull structured data out of messy pasted text or validate a list line-by-line by picking a data type (ZIP codes, credit cards, US phone numbers, emails, or public IPv4 addresses) ...
• text-extractor (about)
  Paste any blob of unstructured text and pull out structured data — email addresses, IPv4 addresses, Luhn-valid credit card numbers, phone numbers, and format-validated US ZIP codes — with live, ...
• json-jsonl-xml-toolbox (about)
  Format, validate, and convert structured data between JSON, JSONL, XML, and CSV without leaving your browser. Paste text, drop a file, or load a sample, then pick an operation — ...
• kagi-api-playground (about)
  Build and inspect requests against every Kagi API surface — FastGPT, the Universal Summarizer, Enrichment (web and news), and the beta Search API — from one form-driven playground. Fill in ...
• nushell-playground (about)
  Run real Nushell pipelines in your browser — the actual Nushell engine compiled to WebAssembly, not a reimplementation. Type a command like `[[name age]; [Alice 30] [Bob 25]]` or `[1 ...
• baml-playground (about)
  Write BAML — Boundary's typed prompting language — and watch the real compiler (loaded as WebAssembly) render the exact prompt your function sends, complete with the schema that `{{ ctx.output_format ...
• data-chef (about)
  Build compositional pipelines that transform text through a chain of operations, in the spirit of CyberChef. Drag operations — encoders, ciphers, hashes, compression, text wrangling, data-format and number conversions — ...
• apk-graph (about)
  Visualize an Android app's internal structure by dropping an APK or DEX file and exploring its class graph — every class drawn as a node, with extends and implements edges, ...
• ungh-playground (about)
  Explore the ungh.cc GitHub proxy API from an interactive, Scalar-style playground that lists every endpoint — repos, files, branches, readme, contributors, releases, stars, orgs, and users — with editable path ...
• json-knife (about)
  Format, validate, diff, and explore JSON, then convert it between YAML, CSV, TOML, TypeScript, and HTML tables — all from one client-side multitool. Pretty-print or minify with custom indentation, walk ...
• amp-timeline (about)
  Visualize Amp agent threads as an interactive, chronological timeline. Load threads (from `amp threads export ` or `~/.local/share/amp/threads/`) by file picker, drag-and-drop, paste, or URL — or point "Open threads ...
• pasted-file-editor (about)
  View and manage text drafts with automatic file attachment capabilities. Paste files or text content of 1,000 characters or more to attach them below the editor while keeping your draft ...

#May 2026 (9 tools)

• markdown-svg-renderer (about)
  View Mozilla Bugzilla bug reports and render formatted markdown content with live preview. Paste markdown directly or load from a raw URL or GitHub Gist, with support for standard markdown ...
• usborne-mad-house (about)
  Play a retro text-based escape game inspired by 1980s Usborne computer books, where you control doorways in a shifting house to align three exits before footsteps catch you. Use keyboard ...
• curly-emdash (about)
  Identify curly quotes, curly apostrophes, and em dashes in your text with this highlighting tool. Paste or type content into the input panel to see matching characters highlighted in the ...
• qr-code-generator (about)
  Generate scannable QR codes from URLs, text, or WiFi network details with customizable styling options. The tool supports multiple encoding modes, including WiFi networks with security settings, and offers various ...
• csp-allow (about)
  Experiment with Content Security Policy (CSP) allow-lists by editing HTML code in the left panel and observing how network requests are handled in the sandboxed preview on the right. Add ...
• big-words (about)
  Display and customize large text with real-time formatting options including fonts, colors, gradients, and effects. Double-click or double-tap the display area to open the settings panel and adjust text content, ...
• github-repo-stats (about)
  View GitHub repository statistics including commit counts, contributor information, language breakdowns, and release details by entering a repository name or URL. This tool fetches data directly from the GitHub REST ...
• redis-array (about)
  Explore Redis array commands in an interactive web-based environment compiled to WebAssembly. This playground lets you execute AR* commands against an in-memory Redis instance, visualize keyspace contents, and inspect command ...
• inat-sightings (about)
  Browse iNaturalist species observations organized by sighting date and time. The page fetches data from a remote source and displays each clump of observations with associated photos, species names, and ...

#April 2026 (7 tools)

• milliseconds (about)
  Convert milliseconds into multiple time units with this interactive tool that displays the duration in seconds, minutes, hours, days, weeks, and a human-readable format. The converter accepts numbers with commas ...
• datasette-io-preview (about)
  Preview and validate datasette.io news entries in YAML format with real-time rendering and markdown linting. The editor loads the current news.yaml file from GitHub and provides immediate feedback on formatting ...
• gemini-flash-tts (about)
  Convert text to natural-sounding speech using Google's Gemini 3.1 Flash TTS model with support for both single-speaker and multi-speaker conversation modes. The tool allows you to customize voice selection, apply ...
• sqlite-qrf (about)
  Format SQLite query results in 20 different styles including box-drawing tables, CSV, JSON, HTML, Markdown, and more using this interactive WebAssembly-based demonstration. Adjust formatting options like column headers, screen width, ...
• github-repo-size (about)
  Check the size of any GitHub repository by entering the owner and repository name or pasting a GitHub URL. The tool fetches repository data from the GitHub API and displays ...
• cleanup-claude-code-paste (about)
  Clean up Claude Code terminal output by removing the ❯ prompt character, fixing whitespace from line wrapping, and joining broken lines into readable paragraphs. Paste your terminal text into the ...
• syntaqlite (about)
  Experiment with SQLite SQL parsing, formatting, validation, and tokenization directly in your browser using the syntaqlite parser. This interactive playground provides four main tools: a code formatter that restructures SQL ...

#March 2026 (10 tools)

• pretext-explainer (about)
  Explore how pure-JavaScript text measurement and line breaking work through an interactive visualization of the Pretext library's pipeline. This tool demonstrates each stage from raw text input through whitespace normalization, ...
• python-vulnerability-lookup (about)
  Search Python packages for known security vulnerabilities by pasting a `pyproject.toml` or `requirements.txt` file, or by loading dependencies directly from a GitHub repository. The tool queries the OSV.dev vulnerability database ...
• dns (about)
  Query DNS records for any domain using Cloudflare's DNS-over-HTTPS API with support for multiple record types (A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV, PTR) and three different resolvers. ...
• manyana (about)
  Explore how generation-counting conflict resolution works in distributed systems by editing two independent document branches and observing their deterministic merge. This interactive tool demonstrates the Manyana merge algorithm, where each ...
• turbo-pascal-deconstructed (about)
  Explore an interactive breakdown of Turbo Pascal 3.02A's 39,731-byte executable, mapping each function from the header and display system through the parser and symbol table. Navigate the binary segments with ...
• sort-algorithms (about)
  Explore and compare different sorting algorithms through interactive animated visualizations that display how each algorithm organizes data in real-time. The tool allows you to adjust dataset size and animation speed, ...
• sqlite-bytecode-explorer (about)
  Explore SQLite's Virtual Database Engine (VDBE) by analyzing the bytecode that SQLite generates when compiling SQL queries. This tool runs the `EXPLAIN` command on your SQL statements and annotates each ...
• mp3-inspector (about)
  Extract ID3 metadata and file information from MP3 audio files using this browser-based tool. Upload an MP3 file by dragging it onto the drop zone or selecting it through the ...
• nicar-2026 (about)
  Browse the NICAR 2026 conference schedule with powerful search and filtering capabilities. This interactive schedule viewer lets you explore sessions across multiple days, filter by session type, track, and skill ...
• gif-optimizer (about)
  Optimize animated GIF files using gifsicle compiled to WebAssembly, with all processing occurring directly in your browser without server uploads. The application offers preset optimization profiles ranging from lossless compression ...

#February 2026 (9 tools)

• markdown-copy-component (about)
  The `` component renders markdown content with built-in controls for viewing the rendered output and copying or viewing the source code. It provides an interactive interface with a menu button ...
• animated-word-cloud (about)
  View animated word cloud visualizations that use an Archimedean spiral placement algorithm to position words on a canvas. Each word spirals outward from the center until it finds an unoccupied ...
• mobile-tables (about)
  Explore interactive demonstrations of responsive table design patterns for mobile and narrow screens. This comprehensive guide covers twelve techniques—from horizontal scrolling and pinned columns to stacked cards, column toggling, accordion ...
• html-validation-demo (about)
  Submit contact information through this responsive form that provides real-time validation using native HTML5 attributes and CSS-only feedback. The form validates required fields including name, email, and message content, displaying ...
• gemini-prompt (about)
  Generate responses from Google's Gemini API with support for system prompts, model selection, and streaming output. The interface stores your API key securely in local storage and maintains a history ...
• gradient-card (about)
  Generate customizable gradient images with multiple pattern overlays and effects. This tool provides controls for linear, radial, and conic gradients with adjustable colors, along with options for layering various patterns ...
• python-comment-stripper (about)
  Remove all comments from Python source code while preserving strings, docstrings, and code structure using the `tokenize` module running on Pyodide. Paste your Python code into the input panel, and ...
• pyodide-repl (about)
  Execute Python code directly in your web browser using Pyodide, a port of CPython to WebAssembly. This REPL provides an interactive Python environment with support for multiple Pyodide versions, single-line ...
• gif-dissector (about)
  Parse and visualize animated GIF files by extracting individual frames, timing data, color palettes, and detailed metadata. Upload a GIF file to instantly decompose it into its constituent frames with ...

#January 2026 (7 tools)

• sqlite-ast (about)
  Parse SQLite SELECT queries into abstract syntax trees and view the results in JSON and Python representations. This tool uses the sqlite-ast library running in your browser via Pyodide to ...
• minesweeper (about)
  Play a classic Minesweeper game directly in your browser with support for three difficulty levels: Easy, Medium, and Hard. Use left-click to reveal cells and right-click to place flags, or ...
• webkitdirectory (about)
  Explore the contents of a local directory in your browser with an interactive file tree viewer and search functionality. This tool demonstrates the capabilities of the `webkitdirectory` input attribute to ...
• bookmarklets (about)
  Access a collection of practical bookmarklets for web development and general browsing tasks. Each bookmarklet can be installed by dragging it to your bookmarks bar on desktop browsers or by ...
• iframe-resize (about)
  Embed untrusted content safely within a webpage using a sandboxed iframe that automatically adjusts its height without allowing cross-origin access. The prototype uses `postMessage` to communicate height changes between the ...
• lobsters-bookmarklet (about)
  Browse Lobste.rs comment threads with an enhanced "Latest" tab that displays all comments in chronological order with newest first, making it easier to catch up on recent discussion activity. The ...
• red-extractor (about)
  Extract red annotations from AI-generated annotated images and overlay them onto your original photos. This tool isolates red markings (circles, arrows, highlights, text) from images created by AI services like ...

#December 2025 (24 tools)

• visualizer (about)
  Create real-time audio-reactive visualizations with eight distinct modes including plasma, particles, tunnel effects, kaleidoscope patterns, Matrix rain, terrain, fire, and starfield animations. The visualizer captures frequency data from your microphone ...
• software-heritage-repo (about)
  Download archived Git repositories from Software Heritage, the universal archive of software source code. This tool queries the Software Heritage GraphQL API to locate repositories and creates downloadable bare Git ...
• cooking-timer (about)
  Create cooking recipes with detailed step-by-step instructions and automatically track elapsed time and upcoming tasks during meal preparation. Load recipes from URLs or paste JSON directly, save frequently-used recipes for ...
• pge-outages-hmb (about)
  Track power outages affecting the Half Moon Bay area with this interactive map displaying real-time PG&E outage data within a 15-mile radius. The application visualizes outage locations as point markers ...
• microquickjs (about)
  Execute JavaScript code in a lightweight MicroQuickJS sandbox environment running via WebAssembly, with results displayed directly on the page. The sandbox supports ES5-like JavaScript features and automatically saves your code ...
• llm-lib (about)
  This is an interactive demonstration of a unified JavaScript library that provides a consistent interface for working with multiple large language model providers. The tool allows users to seamlessly switch ...
• blackened-cauliflower-and-turkish-style-stew (about)
  Track and manage two simultaneous recipes with this interactive cooking timer that displays the current step, upcoming tasks, and a complete timeline with clock times. The timer persists across browser ...
• image-print (about)
  Create custom photo print layouts for A4 pages with adjustable grid configurations, image fitting options, and portrait or landscape orientations. Users can add photos by uploading files or dragging and ...
• grid-lanes-polyfill (about)
  Explore the CSS Grid Lanes polyfill, which brings native masonry-style layout capabilities to all browsers through the `display: grid-lanes` property. The demonstration showcases six practical layout patterns including photo galleries, ...
• json-diff (about)
  Compare JSON documents side-by-side to identify additions, removals, and modifications between two versions. The tool displays differences with color-coded highlighting and provides character-level detail for string changes, making it easy ...
• claude-code-timeline (about)
  View Claude Code session `.jsonl` files as an interactive timeline with customizable filtering and search capabilities. This tool displays events chronologically, extracting conversation messages, tool calls, and file snapshots with ...
• codex-timeline (about)
  View Mozilla Codex rollout timeline events from `.jsonl` files with an interactive interface that supports filtering, searching, and detailed event inspection. Load files via drag-and-drop, paste, or URL fetch, then ...
• quickjs (about)
  Execute JavaScript code in a sandboxed QuickJS WebAssembly environment with a built-in synchronous `fetch()` function for retrieving remote content. Code is automatically encoded in the URL hash, allowing you to ...
• is-it-a-bird (about)
  Determine whether images contain birds using OpenAI's CLIP model running directly in your browser through Transformers.js. Upload images by dragging and dropping, pasting from your clipboard, or selecting files, or ...
• clipboard-backup (about)
  Save and manage clipboard content across multiple formats including text, HTML, RTF, and images with this clipboard backup tool. Paste any content from your clipboard to automatically create a backup ...
• transparent-png (about)
  Make Colors Transparent in PNG is an interactive tool that allows you to remove specific colors from images and export the result with transparent backgrounds. Upload or paste an image, ...
• justhtml (about)
  Test the JustHTML Python HTML5 parser directly in your browser with this interactive playground. Parse, query, and manipulate HTML using CSS selectors, pretty-print documents, extract text content, and convert HTML ...
• view-pdf (about)
  View PDF files from any CORS-enabled URL with this interactive PDF viewer application. The viewer supports navigation between pages, adjustable zoom levels including auto-scaling, and maintains your viewing state through ...
• bugzilla-bug (about)
  View Mozilla Bugzilla bug reports with a streamlined interface that displays bug details, comments, and change history in an organized timeline format. Enter a bug ID, URL, or Bugzilla link ...
• pypi-changelog (about)
  Track code changes across Python package versions by comparing wheel distributions from PyPI. Enter any package name to view all released versions with wheel files and generate side-by-side diffs of ...
• bluesky-search (about)
  Search Bluesky posts using advanced filters and options to organize results by latest or top engagement. This tool requires authentication with your Bluesky account credentials and supports filtering by date ...
• tacopy-playground (about)
  Explore how tail-recursive Python functions are transformed into optimized iterative code using the Tacopy library. Enter your recursive function in the input panel to see the automatically generated transformed version, ...
• notes-to-markdown (about)
  Convert Apple Notes content to Markdown and HTML formats while preserving hyperlinks and formatting. Paste your notes into the text area to automatically generate both Markdown and HTML outputs, with ...
• octave-explainer (about)
  Explore the mathematical and sonic relationship between frequencies through interactive demonstrations and a playable piano keyboard. This educational tool visualizes how an octave represents a 2:1 frequency ratio, allowing you ...

#November 2025 (11 tools)

• analytics (about)
  Track your personal browsing activity across tools.lulzpid.org with real-time analytics stored locally in your browser. View detailed statistics including total visits, unique pages accessed, hourly and daily visit trends, top ...
• omit-needless-words (about)
  Analyze text to identify unnecessary words and phrases using Claude's writing expertise. This tool applies the principle of omitting needless words from Strunk & White's writing guide, marking removable words ...
• new-yorker-style (about)
  Convert text to match The New Yorker's distinctive typographic style, featuring proper diaereses (such as "coöperate" and "naïve"), curly quotation marks, em dashes, and ellipses. Paste your text into the ...
• bluesky-quote-finder (about)
  Search for quote posts on Bluesky by entering a post URL to discover all responses that quote the original post. The tool fetches and displays these quotes with options to ...
• bluesky-faves (about)
  View liked posts from any Bluesky user by entering their profile URL, handle, or DID. This application fetches and displays a user's favorite posts with full post details including text, ...
• link-extractor (about)
  Extract hyperlinks from pasted web content and export them in multiple formats including HTML, Markdown, and plain text. The tool automatically detects and removes duplicate links while displaying each link's ...
• text-diff (about)
  Compare two blocks of text to identify character-level differences between them. This tool uses a dynamic programming algorithm to compute the longest common subsequence and highlights removed text in red ...
• wikipedia-wikitext (about)
  Retrieve the raw wikitext source code from Wikipedia articles by searching for a page title or pasting a direct article URL. The tool features autocomplete suggestions while typing search queries ...
• cors-fetch (about)
  Test HTTP requests directly from your browser and observe which response headers and body content are accessible under CORS (Cross-Origin Resource Sharing) restrictions. This tool lets you construct requests with ...
• xml-validator (about)
  Check XML documents for well-formedness by pasting content into the input area and clicking the validate button. The tool parses the XML and displays any syntax errors with precise line ...
• emoji-identifier (about)
  Extract and identify all emojis from text by pasting or typing into the input field, and instantly view their names and Unicode codepoint values. The tool uses a comprehensive emoji ...

#October 2025 (12 tools)

• badge-repl (about)
  Interact with a MicroPython device via the Web Serial API to execute Python commands in real-time through a browser-based REPL interface. This tool enables direct communication with compatible microcontroller boards, ...
• icon-editor (about)
  Create and edit 24×24 pixel icons with an intuitive browser-based editor featuring a live grid canvas, color picker, and emoji starter templates. Design your icons by clicking pixels directly on ...
• github-graphiql (about)
  Explore GitHub's GraphQL API using an interactive query interface that requires authentication via a personal access token. Enter your GitHub token to connect and start writing, executing, and testing GraphQL ...
• github-ratelimit (about)
  Monitor your GitHub API usage and remaining rate limits with this authentication-based checker. After authenticating with your GitHub account, the tool displays detailed information about your API quotas across different ...
• terminal-to-html (about)
  Convert terminal output into shareable HTML documents with support for colored text formatting. Paste terminal output in RTF, HTML, or plain text format, and the tool instantly generates clean HTML ...
• sloccount (about)
  Count lines of code in source files across multiple programming languages using SLOCCount algorithms compiled to WebAssembly. This tool analyzes code from pasted snippets, GitHub repositories, or uploaded ZIP files, ...
• query-string-stripper (about)
  Remove query parameters and tracking data from URLs with this Query String Stripper tool. Paste any URL to instantly extract the base address by stripping away everything after the question ...
• deep-research-viewer (about)
  Analyze and visualize AI deep research transcripts with this interactive viewer that displays the complete research workflow including reasoning steps, web searches, visited pages, and code executions. Load transcripts from ...
• prompt-caching (about)
  Explore OpenAI's prompt caching feature by testing different prompt structures and observing cache hit rates across multiple requests. This interactive playground lets you compose system instructions, document context, and user ...
• text-indentation (about)
  Adjust indentation levels in your text with this tool that offers multiple formatting options. Add or remove spaces from the beginning of each line, strip all leading whitespace, eliminate trailing ...
• dot (about)
  Render DOT graph files into visual diagrams directly in your browser. Paste your DOT syntax into the textarea and the graph will automatically render as an SVG visualization, with live ...
• json-string-extractor (about)
  Extract all strings from JSON data that exceed 20 characters in length or contain line breaks. This tool is useful for identifying longer text content within complex JSON structures for ...

#September 2025 (7 tools)

• keyboard-debug (about)
  Monitor keyboard input in real-time with this interactive keyboard debugger that displays pressed keys and their corresponding key codes. Press any keys on your keyboard to see them appear with ...
• micropython (about)
  Execute Python code in a sandboxed MicroPython WebAssembly environment with output displayed in real-time. Code is automatically saved to the URL for convenient sharing and persistence, and the environment supports ...
• numpy-pyodide-lab (about)
  Execute NumPy vector and matrix operations directly in your browser using an interactive lab powered by Pyodide. Work through five hands-on exercises covering elementwise operations, dot products, matrix multiplication, broadcasting, ...
• badge-drawer (about)
  Draw pixel art for e-ink badge displays with this web-based canvas editor supporting multiple brush sizes, undo/redo functionality, and real-time black-and-white preview. Export your designs as PNG files or transfer ...
• github-account (about)
  Look up GitHub user profiles and account information by username or numeric account ID. This tool fetches account details from the GitHub REST API, displaying information such as the user's ...
• pyodide-bar-chart (about)
  Execute Python code directly in your browser with Pyodide, a WebAssembly-based Python runtime. This demo loads pandas, numpy, and matplotlib in the client to generate a bar chart from sample ...
• devon-lanes (about)
  Navigate the treacherous single-track lanes of rural Devon in this interactive driving simulator, where you must manage your sanity while encountering cyclists, tractors, caravans, and other obstacles. Each encounter presents ...

#August 2025 (3 tools)

• rich-text-to-markdown (about)
  Convert rich text formats into properly formatted Markdown by pasting content into the text area. The tool automatically detects and converts formatting such as bold, italic, links, code blocks, headings, ...
• hn-comments-for-user (about)
  View Hacker News comments for any user by entering their handle to retrieve up to 1,000 of their most recent comments. The tool displays each comment with its date, the ...
• percentage-recalculator (about)
  Calculate and normalize multiple percentages to sum to 100%, with the option to exclude specific values from the recalculation. Enter up to four percentage values and check the "Ignore this" ...

#July 2025 (7 tools)

• alt-text-extractor (about)
  Extract images and their associated metadata from pasted web content with this tool. When you paste rich text containing images, the application automatically retrieves each image's alt text, URL, and ...
• bullish-bearish (about)
  Learn the difference between bullish and bearish market sentiment through an interactive visual guide featuring animated bull and bear characters. The page uses intuitive animal metaphors—bulls thrust their horns upward ...
• speech-synthesis (about)
  Test the Web Speech API's speech synthesis capabilities by entering text and configuring voice parameters such as rate, pitch, and volume. The application provides a selection of available system voices ...
• open-sauce-2025 (about)
  Browse the Open Sauce 2025 conference schedule with sessions organized by day, including speaker information, session duration, location, and detailed descriptions. Users can search for specific sessions across all three ...
• hacker-news-filtered (about)
  Browse the latest Hacker News stories with customizable content filtering to exclude topics of your choice. Enter comma-separated terms to filter out posts matching those keywords across titles, URLs, and ...
• ffmpeg-crop (about)
  Generate FFmpeg crop commands by uploading a video file and interactively defining a crop area using a draggable overlay. The tool provides both standard and iPhone-compatible FFmpeg command formats that ...
• hacker-news-histogram (about)
  Analyze Hacker News stories by searching for multiple terms across a custom time range and visualize the results as an interactive histogram. The tool fetches monthly hit counts from the ...

#June 2025 (5 tools)

• json-to-markdown-transcript (about)
  Convert JSON transcripts from audio into formatted Markdown with speaker names and timestamps. This tool automatically processes JSON data containing speaker names, text, and timestamp information, formatting them into readable ...
• reading-time (about)
  Calculate reading time estimates for any text by pasting or typing content into the input area. The tool displays real-time statistics including word count, character count, and estimated reading duration ...
• broadcast-channel-chat (about)
  Send chat messages that synchronize instantly across multiple browser tabs using the Broadcast Channel API. Each tab displays messages sent from other tabs with a sync indicator, allowing real-time communication ...
• transfer-time (about)
  Calculate file transfer duration by entering the file size and transfer speed with their respective units. The calculator automatically converts between different measurement units (GB, MB, TB for file size; ...
• date-calculator (about)
  Calculate the time between two dates with detailed breakdowns and visual representations. This tool displays the total number of days, weeks, business days, and weekend days spanning your selected date ...

#May 2025 (3 tools)

• flexbox-playground (about)
  Experiment with CSS Flexbox properties in real-time using this interactive playground. Adjust container properties like flex-direction, justify-content, and align-items while watching the layout change instantly, then select individual items to ...
• code-with-claude-2025 (about)
  Download and view the complete conference schedule for May 22, 2025, in iCalendar format. This page provides access to all 25 events from the San Francisco conference, including keynotes, technical ...
• gemini-image-json (about)
  Parse and visualize JSON responses from the Google Gemini image generation API, extracting and displaying generated images, text content, and usage metadata in a formatted layout. The tool supports direct ...

#April 2025 (12 tools)

• html-preview (about)
  Write HTML code directly in the editor pane and see the rendered output update in real-time in the preview pane. The editor supports live preview with debounced updates to prevent ...
• bluesky-thread (about)
  View Bluesky thread conversations with multiple display options including nested thread view, chronological sorting, and media support. This viewer fetches complete discussion threads from Bluesky posts and renders them with ...
• rtf-to-html (about)
  Convert Rich Text Format (RTF) documents to HTML with preserved formatting, colors, and styling. Paste RTF content from your clipboard to automatically extract the color table and convert text formatting ...
• mask-visualizer (about)
  Visualize bounding boxes and PNG masks from JSON data with support for multiple coordinate system origins. This tool accepts JSON input containing box coordinates and base64-encoded mask images, then displays ...
• gemini-mask (about)
  Use the Gemini API to analyze images and generate segmentation masks with visual overlays. Upload an image and provide a prompt describing what you want to segment, then the application ...
• base64-gzip-decoder (about)
  Decode base64-encoded gzip data to retrieve the original decompressed content. Paste your base64 string into the input field and click the Decode button to process the data. The decoder handles ...
• hacker-news-thread-export (about)
  Export Hacker News discussion threads in a formatted, hierarchical structure by providing a post ID or direct link to the thread. The tool fetches all comments from the specified post ...
• footnotes-experiment (about)
  Explore an interactive footnote system that enhances document reading by displaying footnote content in contextual popups when you hover over or click footnote references. The implementation uses semantic HTML with ...
• paste-html-subset (about)
  Convert rich text content from clipboard into clean, filtered HTML containing only semantic elements like paragraphs, headings, lists, links, and text formatting. Paste formatted content into the editable area to ...
• census-reporter-claude (about)
  Explore American Community Survey demographic and social data through an interactive search and visualization tool. Select geographies such as cities, counties, or states alongside census topics like income, education, or ...
• census-reporter-gemini (about)
  Explore demographic and economic data from the US Census American Community Survey using the Census Reporter API. This tool allows you to search for specific geographic locations and data tables, ...
• passkeys (about)
  Experiment with passkey registration and authentication using the WebAuthn API in your browser. This demo allows you to create passkey credentials, authenticate with them, and inspect the underlying protocol responses ...

#March 2025 (15 tools)

• lightning-timer (about)
  Track time with Lightning Timer, a full-screen countdown application that displays elapsed seconds in large, easy-to-read format. Click the timer display to start, pause, or reset the countdown, and access ...
• avatar-web-component (about)
  Display and edit images with an interactive cropping interface for creating avatars or profile pictures. Users can select images by clicking, dragging and dropping files, or pasting from the clipboard, ...
• huggingface-storage (about)
  Check the storage size of Hugging Face machine learning models by entering a model URL or repository path. The tool queries the Hugging Face API to retrieve the total storage ...
• incomplete-json-printer (about)
  Format truncated or incomplete JSON into readable structures with automatic live formatting as you type. This tool applies consistent indentation and proper spacing to malformed or partial JSON snippets, and ...
• keyboard-filters (about)
  Display and manage multiple filter conditions using an interactive badge interface with keyboard navigation support. Each filter badge displays a column name, operator, and value that can be edited individually, ...
• side-panel-dialog (about)
  Explore a product catalog with interactive item details displayed in a smooth side panel modal. Click any product card to view comprehensive information including category, price, and description, with the ...
• species-observation-map (about)
  Explore wildlife observations on an interactive map by searching for any species and viewing recent sightings from the iNaturalist community. The map displays geotagged observations within a customizable time range, ...
• swagger-subset (about)
  Extract a subset of Swagger/OpenAPI definitions by selecting specific API endpoints and their dependencies. This tool parses a Swagger JSON document, displays all available paths and methods in an interactive ...
• token-usage (about)
  Calculate token usage across your Claude and other LLM API calls by pasting YAML output from the LLM tool's `llm logs -su` command. The calculator automatically groups token consumption by ...
• css-text-wrapping (about)
  Learn how CSS text wrapping properties control how text flows within containers, including word-wrap, word-break, white-space, text-overflow, hyphens, line-break, and text-wrap. This guide provides interactive demonstrations of each property's behavior, ...
• encrypt (about)
  Encrypt and decrypt messages using a passphrase with this web application that leverages modern browser cryptography APIs. The tool generates a secure shareable link containing an encrypted message that can ...
• json-schema-builder (about)
  Create JSON schemas interactively with this builder tool that allows you to define properties, set data types, and configure nested objects through an intuitive form interface. The generated schema is ...
• paste-rich-text (about)
  Extract HTML code from formatted text by pasting rich content into this tool, which automatically captures and displays the underlying HTML markup. The tool provides both the raw HTML code ...
• schema-dsl (about)
  Convert a compact schema definition language into JSON schema format in real-time. This tool accepts a concise DSL where you specify field names, types (str, int, float, bool), and optional ...
• pipfile (about)
  Parse Pipfile.lock files to extract Python package dependencies and convert them into multiple formats for easy management and sharing. The tool automatically extracts package names and versions from the lock ...

#February 2025 (4 tools)

• progress (about)
  Track the progress of the current U.S. presidential term with real-time statistics and a visual progress bar. The page displays elapsed and remaining days, percentage completion, and specific metrics related ...
• apsw-query (about)
  Analyze and explain SQLite queries using APSW by entering SQL code and executing it in an in-browser Python environment. The tool provides detailed query analysis including execution plans, expanded SQL, ...
• sql-pretty-printer (about)
  Format and beautify SQL queries with customizable styling options. This tool supports multiple SQL dialects including SQLite, PostgreSQL, and MySQL, allowing you to control indentation width, keyword capitalization, and indentation ...
• github-issue-to-markdown (about)
  Convert GitHub issues and pull requests to markdown format by providing their URL and an optional personal access token for private repositories. The tool automatically fetches the issue details, all ...

#January 2025 (5 tools)

• image-to-jpeg (about)
  Compress and optimize image files by uploading them to this web-based tool that applies adjustable JPEG quality settings to reduce file size. The interface allows users to compare the original ...
• render-claude-citations (about)
  Render Claude API responses with proper citation formatting by pasting JSON output into this tool. The tool parses the response structure and displays text content alongside blockquote-formatted citations, making it ...
• php-deserializer (about)
  Convert serialized PHP data to JSON format for easy viewing and manipulation. Paste your PHP serialized string into the input field to automatically parse and display the equivalent JSON output. ...
• aria-live-regions (about)
  Explore live region notifications with this interactive accessibility demo that allows you to test how screen readers announce dynamic content updates. The page provides instructions for testing with VoiceOver on ...
• bluesky-resolve (about)
  View and resolve Bluesky handles to their corresponding Decentralized Identifiers (DIDs) using the AT Protocol API. Enter a Bluesky handle in the format `username.bsky.social` to retrieve the associated DID, which ...

#December 2024 (8 tools)

• yaml-explorer (about)
  Parse and visualize YAML files in an interactive tree format with collapsible sections for easy navigation of nested data structures. Enter YAML content directly or load from a URL, then ...
• word-counter (about)
  Track word and character counts across multiple writing sections with automatic saving to browser storage. Each section displays real-time statistics as you type, and content persists between sessions. Add or ...
• openai-webrtc (about)
  Establish real-time audio conversations with OpenAI's GPT realtime models using WebRTC technology. This interface allows you to select from multiple voice options and different model versions, monitoring detailed token usage ...
• json-to-yaml (about)
  Convert JSON data into multiple YAML formats with a single paste. The tool generates three output variations—block style for readability, flow style for compactness, and quoted strings style for explicit ...
• nav-for-headings (about)
  Process HTML content to automatically generate unique IDs for all header elements and create a table of contents with anchor links. This tool is useful for adding navigation functionality to ...
• writing-style (about)
  Analyze your writing for common style issues by pasting text into this tool, which detects weasel words (such as "very" and "quite"), passive voice constructions, and duplicate consecutive words. The ...
• social-media-cropper (about)
  Crop and customize images for social media platforms with precise control over composition and framing. This tool supports multiple popular aspect ratios including Twitter/LinkedIn (2:1), Facebook (1.91:1), Substack (1.4:1), and ...
• prompts-js (about)
  Prompts.js is a lightweight JavaScript library that provides modal dialog functionality for creating alert, confirm, and prompt interactions in web applications. The library enables developers to display user-facing dialogs with ...

#November 2024 (11 tools)

• unix-timestamp (about)
  Convert Unix timestamps to human-readable dates and times with this tool. Enter a Unix timestamp (in seconds or milliseconds) to instantly view the corresponding date and time in both UTC ...
• bluesky-timeline (about)
  View Bluesky social media timelines by authenticating with your account credentials and retrieving live feed data. The application automatically refreshes your timeline at regular intervals while displaying posts with author ...
• bluesky-firehose (about)
  Monitor real-time Bluesky feed data by connecting to the Bluesky Jetstream WebSocket service and viewing incoming posts and events. Send custom JSON messages to filter the feed by collection type, ...
• zip-wheel-explorer (about)
  Browse and view the contents of Python package files (.whl and .zip archives) directly in your browser by entering a PyPI package name or a direct file URL. The tool ...
• iframe-api-explorer (about)
  Explore API endpoints and view their responses in real-time using this interactive tool. The interface uses sandboxed iframes with postMessage communication to safely fetch and display JSON data from remote ...
• bbox-cropper (about)
  Draw bounding boxes on images using an interactive cropping tool powered by CropperJS. Load an image by pasting, dragging and dropping, or selecting a file, then click and drag to ...
• mdn-timelines (about)
  View Mozilla's browser compatibility data to track when web APIs were first supported across different browsers. Search for any API by name to see a chronological timeline of support additions, ...
• iframe-sandbox (about)
  Test and explore HTML, CSS, and JavaScript code in a sandboxed iframe environment with configurable security restrictions. The left panel provides a code editor for writing HTML content, while the ...
• animated-rainbow-border (about)
  Display an animated rainbow gradient border effect around a centered box with interactive controls. The page features a dark theme with a glowing, color-shifting border that can be toggled on ...
• california-clock-change (about)
  Track California's Daylight Saving Time changes with this tool that displays the most recent clock adjustment and alerts you to the next one. The page automatically detects your timezone and ...
• claude-token-counter (about)
  Count tokens in text and images across multiple Claude models using Anthropic's token counting API. This tool allows you to compare token usage between different Claude models, helping you optimize ...

#October 2024 (18 tools)

• openai-audio-output (about)
  Interact with OpenAI's GPT-4o audio models to generate spoken responses to your prompts with customizable system instructions and voice selection. The application processes your input through the OpenAI API, retrieves ...
• gpt-4o-audio-player (about)
  Play audio responses generated by OpenAI's GPT-4 with audio preview model by providing a GitHub Gist URL containing the API response JSON. The player extracts base64-encoded WAV audio data from ...
• link-temp (about)
  View Mozilla Bugzilla bug reports directly from your terminal using this LLM plugin for Google's Gemini API. The plugin enables seamless integration between your command-line workflow and Bugzilla's bug tracking ...
• svg-sandbox (about)
  Embed SVG images directly into HTML using base64 data URIs, which eliminates the need for separate image files and reduces HTTP requests. This demo showcases three different SVG examples encoded ...
• svg-progressive-render (about)
  View SVG content being progressively rendered character by character over a specified duration. Paste an SVG file into the input field, set the animation duration in seconds, and click Render ...
• clipboard-viewer (about)
  Inspect and analyze clipboard data by pasting content into this viewer to see all available formats and their corresponding values. The tool displays text, HTML, images, and file information in ...
• ares (about)
  Convert text to NATO phonetic alphabet equivalents for clear communication in radio, military, and aviation contexts. Enter any combination of letters and numbers, then click the convert button to display ...
• text-wrap-balance-nav (about)
  Explore how the CSS `text-wrap: balance` property affects navigation layout and text distribution across multiple lines. This interactive demonstration allows you to toggle the text-wrap balance feature on and off ...
• escape-entities (about)
  Convert between special characters and their HTML entity representations with this bidirectional encoding tool. Select between Escape mode to convert characters like `<`, `>`, `&`, and quotes into their corresponding ...
• qr (about)
  Decode QR codes from images or your device's camera with this interactive web application. Upload an image by dragging and dropping, clicking to select a file, or pasting from your ...
• openai-audio (about)
  Record audio through your microphone and send it to OpenAI's GPT-4o audio model along with a text prompt to receive AI-generated responses. The tool converts your recorded audio to WAV ...
• extract-urls (about)
  Extract URLs from copied web page content by pasting HTML into the input area, which automatically identifies and displays all hyperlinks found in the pasted material. The tool filters for ...
• sqlite-wasm (about)
  Query pelican sighting records from Half Moon Bay using SQL commands against an in-browser SQLite database. The tool loads sample data containing observations of various pelican species across local beaches ...
• jina-reader (about)
  Convert web pages to structured content using the Jina Reader API, with support for multiple output formats including markdown, HTML, and text. The interface allows you to fetch and preview ...
• click-grid-to-expand (about)
  Explore an interactive CSS grid layout that demonstrates dynamic element expansion with smooth animations. Click the green cell labeled "1x2" to trigger a symmetric animation that expands the element to ...
• event-planner (about)
  Plan events with timezone-aware scheduling and countdown tracking. This application allows you to input event details including title, description, location, date, and time across different US timezones, then automatically calculates ...
• image-to-svg (about)
  Convert raster images to scalable vector graphics using automated tracing technology. Upload a JPG or PNG image by dragging it onto the drop zone or clicking to browse, and the ...
• svg-render (about)
  Convert SVG images to JPEG or PNG format with customizable dimensions, padding, and background colors. The tool allows you to paste SVG code directly, upload SVG files via drag-and-drop, or ...

#September 2024 (6 tools)

• openfreemap-demo (about)
  Explore an interactive map of San Francisco rendered with MapLibre GL and OpenFreeMap tiles, displaying 1000 randomly distributed markers across the city. The demo showcases three different approaches for rendering ...
• user-agent (about)
  Display your browser's user agent string, which contains information about your web browser, operating system, and device. This identifier is sent with every HTTP request your browser makes and helps ...
• markdown-math (about)
  Render Markdown text with integrated LaTeX mathematical equations in real-time as you type. This tool converts your input into formatted HTML output while simultaneously displaying a live preview with properly ...
• github-api-write (about)
  Upload files and images to GitHub repositories using the GitHub API. This tool accepts either text content or image files and commits them to a specified repository path with proper ...
• jina-embeddings-image-token-calculator (about)
  Calculate the token cost for images used in API requests by uploading or dragging an image file into the tool. The calculator analyzes the image dimensions and divides them into ...
• youtube-thumbnails (about)
  View YouTube video thumbnails in multiple resolutions by entering a video URL or ID. This tool extracts and displays all available thumbnail formats from YouTube's image server, allowing you to ...

#August 2024 (5 tools)

• pomodoro (about)
  Track productivity sessions with this Pomodoro timer application that manages timed work intervals with customizable durations. Set a goal for each session, choose from preset time intervals ranging from 5 ...
• gemini-chat (about)
  Chat with Google's Gemini AI models directly in your browser using this interactive chat application. Simply enter your Gemini API key (stored locally for convenience) and select from multiple available ...
• gemini-bbox (about)
  Analyze images using the Google Gemini API and visualize detected objects as bounding boxes or points overlaid on the original image with coordinate grid lines. The tool supports multiple Gemini ...
• tiff-orientation (about)
  Read TIFF orientation metadata from JPEG images by uploading or dragging files into the drop zone. The tool parses the EXIF data embedded in the image file to extract the ...
• audio-spectrum (about)
  Visualize real-time audio frequency data from your microphone as an animated spectrum display. This application uses the Web Audio API to capture microphone input, analyze frequencies using FFT (Fast Fourier ...

#July 2024 (6 tools)

• image-resize-quality (about)
  Compare images at different sizes and quality levels by uploading a photo, defining a crop area, and generating multiple preview versions with varying dimensions and compression settings. The tool displays ...
• exif (about)
  Extract EXIF metadata and GPS coordinates from uploaded images using this viewer. Simply upload or drag-and-drop an image file to instantly display all embedded EXIF data, including GPS latitude and ...
• box-shadow (about)
  Generate custom CSS box-shadow effects with interactive controls and real-time preview. Adjust horizontal and vertical offsets, blur radius, spread radius, color, and opacity using intuitive sliders and color picker to ...
• timezones (about)
  Plan meetings across multiple time zones by selecting two locations and viewing their local times side-by-side. The comparison table displays 48 consecutive hours of UTC times with corresponding local times ...
• chrome-prompt-playground (about)
  Interact with Chrome's built-in language model API through this web-based playground interface. The application allows users to check model availability, download the model if needed, and execute text prompts to ...
• compare-pdfs (about)
  Compare two PDF documents side-by-side to identify differences between them. Upload or drag and drop two PDF files to view their pages rendered as images, with a third panel highlighting ...

#June 2024 (1 tool)

• arena-animated (about)
  Compare Elo ratings across different language models and dates using this interactive animated bar chart. Load your own JSON data with model names, dates, and Elo scores, then watch the ...

#May 2024 (1 tool)

• csv-marker-map (about)
  View CSV data as markers on an interactive map using the `?csv=URL` parameter to specify a CSV file containing latitude and longitude columns. The map supports additional customization through query ...

#April 2024 (2 tools)

• render-markdown (about)
  Convert markdown text to HTML using GitHub's markdown rendering API. The tool provides a live preview of the rendered output and allows you to copy the generated HTML or rich ...
• haiku (about)
  Capture images from your device's camera and generate haiku poetry inspired by what you photograph using Claude's vision capabilities. Press the camera button to take a photo, and the AI ...