JSON Formatter & Validator

Format, validate, and beautify JSON data instantly. Detect errors, minify, and pretty-print JSON with ease.

Input JSON

Output

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the most popular data format for APIs and configuration files.

Common Use Cases

  • API Development: Validate and format API request/response payloads
  • Configuration Files: Format package.json, tsconfig.json, etc.
  • Data Storage: Store and exchange structured data
  • Debugging: Pretty-print minified JSON for easier reading
  • Data Transformation: Validate JSON before processing

JSON Features

  • Syntax Validation: Instantly detect and highlight syntax errors
  • Pretty Print: Format JSON with proper indentation
  • Minify: Remove whitespace to reduce file size
  • Tree View: Visualize JSON structure hierarchically
  • Error Detection: Get detailed error messages with line numbers

JSON Best Practices

  • Always use double quotes for strings (not single quotes)
  • Keys must be strings wrapped in double quotes
  • No trailing commas allowed
  • Use consistent indentation (2 or 4 spaces)
  • Validate JSON before using in production