Free Developer Tools
Fast client-side utilities — tool input stays in your browser.
JSON Formatter & Validator
Paste JSON to validate, pretty-print, or minify it.
Base64 Encode / Decode
UTF-8 safe Base64 conversion.
URL Encode / Decode
Percent-encode or decode URI components.
Hash Generator
SHA digests via Web Crypto — runs entirely in your browser. (MD5 not supported by the platform.)
Password Generator
Cryptographically random passwords via crypto.getRandomValues.
Strength: —
UUID v4 Generator
Random UUIDs, one or a batch of ten.
Regex Tester
Live JavaScript regex matching with capture groups.
Meta / OG Tag Generator
Fill the fields — get a SERP preview and copyable head tags.
Color Converter
HEX / RGB / HSL conversion, contrast check, and shade palette.
#00f5ffrgb(0, 245, 255)hsl(183, 100%, 50%)CSS Gradient Generator
Linear or radial gradients with up to three stops.
JWT Decoder
Decodes header & payload. Signature is not verified — never trust a decoded token server-side.
Timestamp ⇄ Date Converter
Unix seconds or milliseconds to readable dates, and back.
AI Demo Builder
Describe a small front-end demo — AJ AI generates a self-contained HTML page and previews it in a sandboxed frame.