All tools

Pretty-print, minify, sort and validate JSON with clear, line-numbered error messages.

Indent, minify and check XML documents — including SOAP, RSS, SVG and config files.

A git-style unified diff of two JSON documents, pretty-printed and optionally key-sorted first.

A git-style unified diff of two XML documents after both are re-indented consistently.

Convert between Unix time (seconds or milliseconds) and human dates in any time zone.

Encode text to Base64 and decode it back, with full Unicode and URL-safe support.

Percent-encode and decode URLs, query strings and individual components.

Decode a JWT's header and payload and check expiry — without sending it anywhere.

Generate cryptographically-random UUIDv4 or sortable UUIDv7 identifiers in bulk.

Compute cryptographic hashes of text in MD5, SHA-1, SHA-256 and SHA-512.

Open any site through a proxy and watch the API calls it makes — filter them and copy any request as cURL, right from your phone.

Paste a curl command, run it from a server, and see the status, headers and response body — with the JSON pretty-printed.

Connect to a PostgreSQL database, browse tables and run SQL from a self-hosted console.

Connect to a MySQL database, browse tables and run SQL from a self-hosted console.

List Kafka topics and stream messages live from a self-hosted console.

Subscribe to MQTT topics and publish messages from a self-hosted console.