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JSON Formatter & Validator

Developer Utilities

Validate and beautify messy JSON strings with customized 2-space, 4-space, or tab indentation. Locates syntax errors with exact line and character positions.

100% Client-Side
Format:

Zero-Knowledge Privacy Guarantee

This JSON Formatter & Validator executes 100% locally in your browser’s JavaScript memory using client-side Web APIs. No inputs, keys, tokens, files, or outputs are ever uploaded to any server or logged in any database.

Key Features & Capabilities

  • Indentation options: 2 spaces, 4 spaces, Tabs, or Minified
  • Precise syntax error detection with error message highlights
  • JSON tree statistics (object depth, keys count, array items)
  • 1-click copy and JSON file download

How to Use This Tool

  1. 1Paste your raw JSON text into the input panel.
  2. 2Select formatting preference (2 spaces, 4 spaces, or Minify).
  3. 3Check the real-time validation indicator for syntax errors.
  4. 4Copy the formatted output or export as a .json file.

Frequently Asked Questions (FAQ)

Yes, it validates deeply nested objects, arrays, escaped characters, and UTF-8 strings according to RFC 8259 specifications.

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