JSON Formatter & Minifier

Format, minify, and validate JSON data. All processing happens in your browser.

Raw JSON Input

Formatted Output

How to Use

1

Paste your JSON

Copy your JSON data into the left input area (JSON Input)

2

Choose an action

Format - Makes JSON readable with proper indentation. Minify - Compresses JSON. Auto-Fix - Repairs common errors. Clean - Fixes basic formatting.

3

Get your result

Check the formatted JSON in the right panel, then copy to clipboard or download as a file.

About

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate.

Want to learn more? Check out the official JSON documentation .

Features

Formatting Features
  • ✓ Format and beautify minified JSON
  • ✓ Minify JSON to reduce file size

Validation Features

  • ✓ Real-time JSON validation
  • ✓ Detailed error messages with line numbers
  • ✓ Copy formatted output with one click

Privacy & Security

Your JSON data privacy is our top priority:

  • • All JSON processing happens entirely in your browser
  • • Your data never leaves your device or gets sent to our servers
  • • No data is stored, cached, or logged anywhere
  • • Works completely offline once loaded

Frequently Asked Questions

Is my JSON data safe?
Yes! All JSON processing happens entirely in your browser. Your data is never sent to any servers or stored anywhere. The tool works completely offline once loaded.
Can I format large JSON files?
The tool can handle reasonably large JSON files, but very large files (>10MB) may cause performance issues in your browser. For massive files, consider using server-side tools or breaking the JSON into smaller chunks.
How do I fix JSON syntax errors?
Common JSON errors include missing quotes around strings, trailing commas, unescaped characters, and mismatched brackets. The error messages will show you the approximate location of the issue. Make sure all strings are in double quotes and objects/arrays are properly closed.
What does the Auto-Fix feature do?
The Auto-Fix feature automatically corrects common JSON issues:
  • Removes outer quotes from double-encoded JSON strings
  • Unescapes backslashes and quotes
  • Adds quotes around unquoted object keys
  • Converts single quotes to double quotes
  • Removes trailing commas
  • Fixes boolean and null values (True→true, None→null)
  • Removes JavaScript-style comments

Use "Clean" for basic fixes or "Auto-Fix" for comprehensive cleaning and formatting.

What's upcoming?

Syntax Highlighting

Color-coded JSON with proper syntax highlighting for better readability.

Planned

Schema Validation

Validate JSON against custom schemas (JSON Schema support).

Planned

Tree View

Interactive tree view for exploring nested JSON structures.

Planned

File Upload

Drag and drop JSON files for instant formatting.

Planned

Diff Viewer

Compare two JSON objects and highlight differences.

Planned

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