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JSON Formatter & Validator

Format, validate, minify, and sort JSON locally for API responses, config files, and quick debugging.

Core processing runs in your browser. Keep the tab open until downloads or copied results are complete.
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Guide

Usage, privacy, and related tools

Best for

  • API responses
  • Config files
  • Nested object review

Privacy

JSON payloads stay in the browser, which is useful for confidential examples and production-adjacent data.

Quick tips

  • Pretty-print before reviewing nested data.
  • Sort keys when comparing payloads.
  • Minify only after validation passes.

How to use this tool

  1. Paste raw JSON.
  2. Format, minify, or sort keys.
  3. Fix validation errors or copy the clean output.

Common questions

Does the JSON Formatter validate syntax?

Yes. It reports invalid JSON so you can fix the input before copying output.

Can I format private API responses?

Yes. Formatting happens locally in the browser.

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