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JSON Formatter & Validator

Prettify, validate, minify, and inspect JSON payloads with high precision error detection and structure diagnostics.

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Indent:
Input JSON0 characters
Formatted ResultWaiting for format

How to Use the JSON Formatter

  1. Paste any valid or invalid JSON string into the left input pane.
  2. Click Prettify / Format to indent and restructure, or Minify to condense into one line.
  3. If an error occurs, inspect the exact line and column pointer to correct missing quotes or trailing commas.
  4. Click Copy to clipboard or Download .json to save the formatted file.

Privacy & Security Guarantee

Your confidential JSON data is evaluated locally inside your browser using the native V8 JavaScript parser. No network requests are made, ensuring your API tokens and credentials remain completely confidential.