Online tools for developers

Everyday utilities, ready when you open the page. Tool inputs are processed locally in your browser.

• Timestamp Converter

  Convert Unix timestamps to human-readable dates and back, with seconds/milliseconds and time zone support.

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• JavaScript Playground

  Write and run JavaScript snippets right in your browser and see the output instantly.

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• Excel to JSON Converter

  Convert Excel spreadsheets to JSON and back, entirely in your browser — no upload.

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• JSON Masker

  Mask sensitive field values in JSON with one click so you can share API data safely.

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