JSON Formatter & Validator — Free Online Tool

Paste your JSON below to format, validate, and beautify it instantly.

 
 
  
       
  
  
 
 
What is JSON?
 
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is widely used in web APIs, configuration files, and data storage.
 
How to Use This JSON Formatter
 
     
  1. Paste or type your JSON into the input area on the left
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  2. Click Format to beautify with indentation
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  3. Click Minify to compress into a single line
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  4. Click Validate to check if your JSON is valid
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  5. Click Copy Output to copy the result to your clipboard
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Features
 
     
  • Instant JSON formatting with 2-space or 4-space indentation
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  • JSON validation with detailed error messages and line numbers
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  • Minify JSON to reduce file size
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  • One-click copy to clipboard
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  • Works entirely in your browser — your data never leaves your device
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  • No signup, no limits, completely free
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