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Free JSON Formatter & Schema Extractor

Prettify JSON and extract schema structure instantly in your browser

Indentation:
Your JSON is processed locally in your browser and is never sent to any server.

Format, validate, and analyze JSON data with this comprehensive tool. Perfect for developers, API testers, and anyone working with JSON data who needs to quickly format or understand JSON structure.

Features

  • JSON Prettifier - Format and indent JSON for better readability
  • Schema Extractor - Extract the structure without values, showing data types
  • Instant Validation - Detect and highlight JSON syntax errors
  • Copy to Clipboard - One-click copy of formatted output
  • Privacy First - 100% client-side processing, your data never leaves your browser

JSON Prettifier

Transform minified or poorly formatted JSON into a clean, readable format with proper indentation. Customize indentation size (2, 4, or 8 spaces, or tabs).

Schema Extractor

Extract the structural schema from any JSON, replacing values with their data types:

  • Strings become "string"
  • Numbers become "number"
  • Booleans become "boolean"
  • Null values become "null"
  • Arrays show the type pattern of their contents
  • Nested objects are recursively processed

Use Cases

  • Format API responses for debugging
  • Generate documentation schemas
  • Validate JSON syntax before use
  • Understand complex nested JSON structures

100% Free - No account required. No data limits. No server uploads.