ConvertTools

JSON Formatter & Validator

Format, minify, and validate JSON. Syntax highlighting and error reporting. Free and browser-based.

 
  
 
How to use JSON Formatter
 
     
  1.   1  
    Paste your JSON into the input field.
     
  2.   2  
    Click Format to pretty-print or Minify to compress.
     
  3.   3  
    Choose between 2-space or 4-space indentation.
     
  4.   4  
    Copy the formatted output.
     
    5.  
 
 
 
Why use this tool?
 
     
  •     Instant validation — errors are highlighted with line numbers. 
  •     Format and minify in one click. 
  •     Handles large JSON documents efficiently. 
    •  
 
 
 
Frequently Asked Questions
 
 
  What happens with invalid JSON?     
The tool shows the exact error message from the JSON parser, helping you locate and fix syntax issues.
 
  Is there a size limit?     
No hard limit. The tool runs in your browser, so it can handle JSON documents up to several megabytes. Very large files (10MB+) may be slow.
 
 
 
 
 
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