Free Online Developer Tools

Free developer tools: JSON formatter, regex tester, Base64 and URL encoder, HTML CSS JS minifier, color converter and hash generator. Private and fast.

๐Ÿ’ป 7 toolsโœ“ 100% freeโœ“ No sign-upโœ“ Private

About these developer tools

MamaTool's developer tools cover the small jobs that come up in every project. Format and validate JSON, encode or decode Base64 and URLs, test regular expressions with live highlighting, minify HTML, CSS and JavaScript, convert colors between HEX, RGB and HSL, and generate SHA hashes for text and files.

Everything runs locally in your browser, so API responses, tokens and source code never leave your device. Clear error messages and copy buttons keep the tools quick to use, whether you are debugging at work or learning to code.

What you can do

  • JSON Formatter: Format, validate, minify and sort JSON with clear error messages.
  • Base64 Encoder Decoder: Encode text or files to Base64 and decode Base64 back to text.
  • URL Encoder Decoder: Percent-encode or decode URLs and break a link into its parts.
  • Code Minifier: Minify HTML, CSS and JavaScript to shrink file size.
  • Regex Tester: Test regular expressions live with highlighted matches and groups.
  • Color Converter: Pick a color and convert it between HEX, RGB and HSL instantly.
  • Hash Generator: Create SHA-1, SHA-256, SHA-384 and SHA-512 hashes for text or files.

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