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🔒 Runs in your browser – nothing is uploaded

Developer Tools

Fast, free and private tools for developers. Everything runs in your browser, so your code and data stay with you.

All tools

🔍Regex Tester↔️Text Diff Checker📊JSON ⇄ CSV Converter🎫JWT Decoder🆔UUID Generator📄Lorem Ipsum Generator📝Markdown Previewer</>HTML Entity Encoder & Decoder

How to use

  1. Paste or type your input.
  2. Adjust the options.
  3. Copy the result.

Frequently asked questions

Is it free?

Yes. All tools are free, with no sign-up and no limits.

Is my code or data uploaded?

No. Everything runs locally in your browser, so your code and data stay private.

Does it work on mobile?

Yes. It works in any modern mobile or desktop browser.