Developer tools

Encode, decode, format and generate everyday data: Base64, URLs, JSON, XML, JWTs, UUIDs and cron expressions, plus OpenAPI specs for CRUD APIs. All tools run fully in your browser — nothing is uploaded. Copy results with one click.

• Base64 Encode / DecodeEncode text or files to Base64 and decode it back, UTF-8 safe.
• Cron Expression ExplainerExplain a cron expression in plain English and list its next run times in any time zone.
• JSON FormatterFormat, minify and validate JSON, with the line and column of any error.
• JWT DecoderDecode a JWT's header and payload, check its expiry and verify the signature.
• OpenAPI GeneratorType a resource name and get a valid OpenAPI spec for a CRUD API, as YAML or JSON.
• URL Encode / DecodePercent-encode and decode text and URLs as UTF-8, and split a URL into its parts.
• UUID GeneratorGenerate UUID v4 and v7, up to 100 at once.
• XML FormatterFormat, minify and check XML, with the line and column of any error.