JSON Formatter & Validator
Enter or Ctrl+Enter = Format
Input JSON
Formatted Output 
Output will appear here...
0 B
Size
0
Lines
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Total Keys
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Max Depth

JSON Formatter & Validator — Step-by-Step Guide

JSON (JavaScript Object Notation) is a lightweight, text-based format used by applications and servers to exchange structured data. This tool instantly validates, formats, and minifies your JSON — entirely inside your browser, with no data ever sent to a server.

1
Paste or Type Your JSON

Paste your JSON data into the Input JSON box on the left. The tool validates it live as you type — a green banner confirms valid JSON, while an error banner shows the exact Line and Column of any mistake.

{"name":"Amit","age":25,"active":true}
2
Format (Beautify) Your JSON
Shortcut: Enter or Ctrl + Enter

Click Format to convert compressed JSON into a clean, indented, color-highlighted structure. Use the Indent dropdown to choose 2 spaces, 4 spaces, or Tab.

{ "name": "Amit", "age": 25, "active": true }
3
Minify for Production

Click Minify to strip all whitespace and compress your JSON to a single line — ideal for APIs, config files, and reducing payload size.

{"name":"Amit","age":25,"active":true}

The stats bar below the output shows exactly how many bytes were saved.

4
Sort Keys Alphabetically

Enable Sort keys A→Z in the options bar to reorder all object keys alphabetically at every nesting level. This makes comparing two large JSON config files significantly easier.

5
Copy or Download Output

Use the Copy button in the toolbar — or the small copy icon in the top-right corner of the output box — to copy the result to your clipboard instantly.

Click Download to save the formatted or minified JSON as a formatted.json file on your device.

6
Understand & Fix Errors

Invalid JSON shows a red banner with the exact error, line, and column. The three most common mistakes are:

• Keys without double quotes: {name:"x"} ❌

• Trailing comma: [1,2,3,] ❌

• Single quotes: {'a':1} ❌ — JSON requires "

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Pro Tips Click Sample to instantly load a rich example JSON and explore all features · Stats below the output panel show live Size, Lines, Total Keys & Max Depth · Your Dark / Light mode preference is saved automatically · Everything runs 100% client-side — your JSON data never leaves your browser.