JSON Formatter & Validator

Format, validate, prettify, minify, and inspect JSON in an interactive collapsible tree view with syntax error highlighting.

Loading interactive JSON Formatter & Validator interface...

How to Use JSON Formatter & Validator

  1. Paste unformatted or minified JSON into the editor.
  2. Click "Prettify" (2 spaces or 4 spaces) or "Minify".
  3. If JSON contains errors, view the exact line and column location of syntax issues.
  4. Switch to "Tree View" to explore nested keys and arrays interactively.

Technical Specifications & Formula

Parsed using native JSON.parse with custom recursive tree renderer and whitespace indentation serialization.

Frequently Asked Questions

Can it handle large JSON payloads?

Yes, it comfortably formats multi-megabyte payloads in browser memory.

Is my API data sent over the network?

Never. Processing is 100% client-side.

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