Developer tools
JSON, Base64, regex, colors and more. 11 developer tools, all free.
Available tools
JSON Formatter Free Pretty-print, minify and validate JSON with precise error messages. Base64 Encode / Decode Free UTF-8 safe Base64 with URL-safe variant, both directions. URL Encode / Decode Free Percent-encoding in component or full-URL mode. Code Beautifier Free Prettier formatting for JS, TS, CSS, HTML, JSON, Markdown, YAML. Regex Tester Free Live highlighting, groups, flags and replace preview. Unix Timestamp Converter Free Epoch seconds or milliseconds to dates in any time zone. Color Picker & Palette Free HEX, RGB, HSL, OKLCH conversions, contrast checks and harmonies. Markdown Editor Free Split-pane editing, sanitised preview, HTML export, autosave. UUID Generator Free v4 (random) and v7 (time-ordered), in bulk. Hash Generator Free SHA-256/384/512 and SHA-1 for text or files. JWT Decoder Free Header, payload and expiry status at a glance.