JSON Formatter & Validator
Format, beautify, minify, and validate JSON with syntax highlighting. Instant error detection with line numbers.
Paste your JSON here or click "Load Sample" to see an example
Formatted JSON will appear here
How to Use the JSON Formatter
Paste Your JSON
Enter or paste your JSON data into the input field. You can also click "Load Sample" to see an example.
Choose an Action
Format to beautify with proper indentation, Minify to compress, or Validate to check for errors.
Copy the Result
Click "Copy" to copy the formatted or minified JSON to your clipboard for use in your project.
Features
Format & Beautify
Transform compact JSON into readable, properly indented format with customizable spacing.
Minify & Compress
Remove all whitespace to reduce file size for production use and faster data transfer.
Validate with Errors
Detect JSON syntax errors with precise line and column numbers for easy debugging.
Syntax Highlighting
Color-coded output distinguishes keys, strings, numbers, booleans, and null values.
JSON Statistics
View file size, key count, and nesting depth to understand your JSON structure.
Privacy First
All processing happens locally in your browser. Your data never leaves your device.
Frequently Asked Questions
What is JSON formatting?
JSON formatting (also called beautifying or pretty-printing) is the process of adding proper indentation, line breaks, and spacing to JSON data to make it human-readable. Formatted JSON is easier to read, debug, and understand than minified or compacted JSON.
What's the difference between formatting and minifying JSON?
Formatting JSON adds whitespace, indentation, and line breaks to make it readable. Minifying JSON removes all unnecessary whitespace to reduce file size. Formatted JSON is better for development and debugging, while minified JSON is better for production to reduce bandwidth usage.
How do I fix invalid JSON?
Common JSON errors include:
- Missing or extra commas - Check for trailing commas or missing commas between items
- Unquoted keys - All keys must use double quotes:
"key" - Single quotes - JSON requires double quotes, not single quotes
- Trailing commas - Remove commas after the last item in arrays/objects
- Unescaped characters - Special characters like quotes and backslashes need escaping
Our validator shows the exact line and column where errors occur to help you fix them quickly.
Is my JSON data secure when using this tool?
Yes, all JSON processing happens entirely in your browser using JavaScript. Your data is never sent to any server. We don't store, log, or have access to any JSON you format or validate. This makes it safe to use with sensitive or confidential data.
What indentation options are available?
Our JSON formatter supports:
- 2 spaces - Most common, recommended by many style guides
- 4 spaces - Popular in Java and Python communities
- Tab - Uses tab characters for indentation
Choose the option that matches your project's code style or personal preference.