Data
JSON Formatter
Format, minify, and validate JSON in your browser. Nothing is sent to a server.
Developer tools
Every V1 tool runs in your browser. Open a category or jump straight to a workspace.
Categories
Data
Data
JSON Validator
Validate JSON and see clear error locations. Runs entirely in your browser.
Data
JWT Decoder
Decode a JWT header and payload in your browser. Decoding does not verify the signature.
Encoding
Encoding
Base64 Encoder / Decoder
Encode and decode Base64, including Unicode text, locally in your browser.
Encoding
URL Encoder / Decoder
Encode and decode URL components, including Unicode, in your browser.
Generators
Generators
UUID Generator
Generate UUID v4 identifiers locally with the Web Crypto API.
Generators
Cron Expression Generator
Build a cron expression from minute, hour, day, month, and weekday, with a plain-language explanation.
Time
Time
Unix Timestamp Converter
Convert between Unix timestamps and dates. Seconds or milliseconds, local time or UTC.
Text & Query
Text & Query
Regex Tester
Test regular expressions against sample text in your browser. Invalid patterns cannot crash the page.
Text & Query
SQL Formatter
Format SQL in your browser. Supported dialects are listed on the page; this is not a universal SQL parser.