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Free Developer Tools
Format, validate, encode and debug — the everyday dev toolbox.
12 tools — no subscription, no forced signup.
JSON Formatter
Beautify and indent messy JSON so it is easy to read.
Open toolJSON Validator
Check JSON syntax and get a clear error location.
Open toolBase64 Encoder
Encode and decode Base64 text safely in your browser.
Open toolURL Encoder
Percent-encode and decode URLs and query strings.
Open toolUUID Generator
Generate random RFC 4122 version 4 UUIDs in bulk.
Open toolHash Generator
Create SHA-1, SHA-256 and SHA-512 hashes from any text.
Open toolJWT Decoder
Decode JWT header and payload without sending data anywhere.
Open toolRegex Tester
Test regular expressions against sample text with live matches.
Open toolHTML Formatter
Format and indent HTML markup for readable source.
Open toolCSS Formatter
Beautify CSS with consistent indentation and spacing.
Open toolJS Minifier
Strip comments and whitespace to shrink JavaScript files.
Open toolTimestamp Converter
Convert Unix timestamps to readable dates and back.
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