JSON Formatter

Beautify or minify your JSON data.

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JSON Formatter & Validator

Use this tool to format messy JSON into a readable tree structure or minify it for production use.

Instant Validation

Fix syntax errors fast. The tool highlights exact lines where your JSON is broken.

Auto-Beautify

Transform one-line minified strings into readable, perfectly indented code.

Minify to Save Space

Remove unnecessary whitespace to reduce file size for production APIs.

JSON Made Human-Readable

JSON is the language of modern web APIs, but raw JSON data is often messy or minified. Our tool bridges the gap between machine code and human readability.

  • Debugging

    Quickly find that missing comma or bracket in complex API responses.

  • Data Visualization

    See nested objects clearly to understand data structure.

  • 100% Private

    Processed strictly in your browser. Sensitive data never hits our servers.

Technical Details

Syntax Rules

JSON (JavaScript Object Notation) requires strict syntax: keys must be enclosed in double quotes `"key"`, and trailing commas are not allowed.

Data Types

JSON supports specific data types: **Objects** `{}`, **Arrays** `[]`, **Strings** `""`, **Numbers**, **Booleans** (`true`/`false`), and `null`. It does not support functions or dates.

Validation Process

Our validator uses the standard `JSON.parse()` method. If parsing fails, it catches the error and extracts the line number to show you exactly where the syntax error is located.

How to Format JSON

1

Input JSON

Paste your raw JSON code into the left text area.

2

Validate & Format

Click "Prettify". If there's an error, it will show red. If valid, it becomes readable.

3

Copy Result

Use "Minify" if needed, then click "Copy" to take the code with you.