JSONL Validator

Check that every non-blank line is valid JSON. NDJSON / JSON Lines, validated entirely in your browser.

Require each record to be an object

Ignore blank lines

Input JSONL

Drop a .jsonl/.ndjson file here, or click to browse

Paste or drop JSONL above to validate. Each line should be a complete JSON value.

Validation uses your browser's native JSON.parse, one line at a time. Nothing leaves your machine.