Development

Edit, validate and explore JSON as text, trees or tables, and export YAML or data models.

Convert JSON Lines (NDJSON) to a JSON array and back while preserving exact numbers.

Convert Unix timestamps and dates in any IANA time zone, individually or in batches.

Convert integers between binary, octal, decimal and hexadecimal.

Generate version 4 or time-ordered version 7 UUIDs locally.

Generate random passwords with configurable length.

Test JavaScript regular expressions against text.

Convert CSV tables and JSON object arrays locally.

Convert YAML and JSON locally while preserving exact numeric literals.

Format JavaScript, TypeScript, HTML and CSS locally with configurable style.

Inspect a compact JWT header, payload and time claims locally without uploading the token.

Calculate upcoming cron occurrences with an explicit time zone, entirely in your browser.

Inspect URL components and repeated query parameters without visiting the address.

Compare JSON values with exact numbers, escaped paths and a downloadable structural change report.

Format or compact SQL locally with dialect, indentation and keyword case controls.

Parse User-Agent strings locally to inspect declared browser, engine, operating system and device details.

Format, minify and validate XML locally while preserving mixed text, CDATA and namespaces.

Convert a literal curl request into JavaScript Fetch, Python requests or Go net/http code locally.

Generate and verify Apache bcrypt password entries locally with random salts and UTF-8 length checks.

Minify JavaScript, CSS or HTML locally without running it or fetching its resources.

Search bundled IANA HTTP status codes, classes and registry descriptions locally.