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JSON Formatter & Validator

Format, beautify, validate and minify JSON with clear error messages and a collapsible tree view.

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🔒PrivateRuns in your browser — nothing is uploaded.
⚡FastInstant results, no waiting in queues.
💸FreeNo sign-up, no watermark, no limits.
📱AnywhereWorks on phone, tablet and desktop.

How to use the JSON Formatter & Validator

  1. Paste your JSON
  2. Click Format, Minify or Validate
  3. Copy or download the result

About this tool

Format, beautify, validate and minify JSON with clear error messages and a collapsible tree view. JSON Formatter & Validator is part of ToolNest's collection of free developer tools. It works instantly in your browser with no account and no installation.

Frequently asked questions

Is the JSON Formatter & Validator free to use?

Yes. JSON Formatter & Validator on ToolNest is completely free, with no sign-up, no watermark and no daily limits.

Is my data private?

Yes. JSON Formatter & Validator runs entirely in your browser. Your text and data are not uploaded or stored on our servers.

Does JSON Formatter & Validator work on mobile phones?

Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.