JSON Formatter & Validator

Format, validate, and visualize JSON data instantly. Privacy-first, works offline, zero tracking.

Input JSON
Drop JSON file here 
 
 
 
 
 
 
 
 
 
 
  
   
  
    
 
  
 
JSON Validator
 
Validate your JSON and get detailed error messages with line and column numbers.
  
  
 
Conversion Tools
 
       
 
 
  
 
  
 
Bulk Tools
 
Process multiple JSON objects at once. Enter one JSON per line.
 
     
  
 
  
 
 
History
  
  
  
 
Keyboard Shortcuts
 
 
 Ctrl + Enter Format JSON 
 
 Ctrl + Shift + V Validate JSON 
 
 Ctrl + Shift + M Minify JSON 
 
 Ctrl + Shift + C Copy output 
 
 Ctrl + Shift + X Clear input 
 
 
  
 
Developer Guides
 
Learn how to work with JSON in your favorite programming language.
 
  
JS
 
 
JavaScript
 
JSON.parse, JSON.stringify, and more
 
   
PY
 
 
Python
 
json module, loads, dumps
 
   
JV
 
 
Java
 
Jackson, Gson, org.json
 
   
PHP
 
 
PHP
 
json_encode, json_decode
 
   
GO
 
 
Go
 
encoding/json package
 
   
C#
 
 
C#
 
System.Text.Json, Newtonsoft
 
   
RB
 
 
Ruby
 
JSON module, parse, generate
 
   
RS
 
 
Rust
 
serde_json crate
 
  
 
  
 
Frequently Asked Questions
 
 
 What is JSON Formatter? 
JSON Formatter is a free online tool that helps developers format, validate, and beautify JSON data. It provides features like syntax highlighting, tree view, minification, and conversion to other formats.
 
 
 Is my JSON data secure? 
Yes, all JSON processing happens entirely in your browser. No data is ever sent to any server. Your JSON data stays private and secure on your device.
 
 
 Does JSON Formatter work offline? 
Yes, JSON Formatter is a Progressive Web App (PWA) that works completely offline. You can install it on your device and use it without an internet connection.
 
 
 What formats can I convert JSON to? 
JSON Formatter supports conversion to and from Base64, YAML, and XML formats. You can also export formatted JSON as TXT, JSON, or CSV files.
 
 
 How do I validate JSON? 
Simply paste your JSON into the input field. The validator will automatically check the syntax and display any errors with the exact line and column number where the issue occurs.