5 free tools
Developer Tools
Developer tools for quick, everyday tasks. Pretty-print and validate JSON, minify CSS safely, encode or decode Base64, and convert colour codes between HEX, RGB, HSL and CMYK with contrast checks. Everything runs client-side.
- Developer Tools
JSON Formatter
Beautify minified JSON with 1 to 8 spaces of indentation. Validates syntax, then copy…
- Developer Tools
CSS Minifier
Minify CSS by removing comments and extra whitespace safely. Strings, url() values and selectors…
- Developer Tools
Base64 Encode
Encode any text, including emoji and Hindi or Marathi, to standard padded Base64 using…
- Developer Tools
Base64 Decode
Decode standard padded Base64 back to readable UTF-8 text, including emoji and Indian scripts.…
- Developer Tools
Color Converter
Convert HEX color codes, including #RGB short codes and codes without #, to RGB…
Everyday developer utilities
The JSON Formatter makes API responses readable and points to the exact place where invalid JSON breaks. The CSS Minifier shrinks stylesheets safely before deployment, and the Base64 tools encode or decode text such as tokens and data URIs.
The Color Converter translates between HEX, RGB, HSL and CMYK and shows contrast ratios, so you can choose accessible text colours. Everything runs client-side, but as a rule never paste live passwords or private keys into any website.
Quick tips
- Base64 is encoding, not encryption: anyone can decode it.
- Aim for a contrast ratio of at least 4.5:1 for body text.
Developer Tools: common questions
Why does my JSON fail to validate?
The most common causes are trailing commas, single quotes instead of double quotes, and comments, none of which are allowed in JSON.