JSON Diff Checker

JSON Diff Checker - Compare and Find JSON Differences

A powerful JSON diff checker that compares two JSON objects and highlights differences. Easily identify added properties, removed properties, and modified values. Perfect for developers comparing API responses, configuration files, or debugging JSON data changes.

What is a JSON Diff Checker?

A JSON Diff Checker is a tool that compares two JSON objects and shows the differences between them. It helps you:

- Identify changes between JSON versions
- Debug API response differences
- Compare configuration files
- Track data modifications
- Verify JSON updates

The tool highlights added properties, removed properties, and modified values, making it easy to see what changed.

How do I use this tool?

Using the JSON Diff Checker is simple:

1. Paste your first JSON object in 'JSON 1 (Original)'
2. Paste your second JSON object in 'JSON 2 (Modified)'
3. Click 'Compare' to see the differences
4. Review the highlighted differences

The tool will show:
- Added properties (green)
- Removed properties (red)
- Modified values with before/after comparison
- Nested object differences

What types of differences are detected?

The tool detects all types of JSON differences:

- Added Properties: New keys in JSON 2 that don't exist in JSON 1
- Removed Properties: Keys in JSON 1 that are missing in JSON 2
- Modified Values: Properties that exist in both but have different values
- Type Changes: When a value changes type (string to number, object to array)
- Nested Changes: Differences in nested objects and arrays
- Array Differences: Added, removed, or changed array elements

Each difference is clearly labeled and color-coded for easy identification.

Can I compare large JSON files?

Yes, this tool can handle large JSON files efficiently. However:

- Very large files (>5MB) may take longer to compare
- Complex deeply nested structures require more processing time
- Browser memory limits may affect extremely large files

Tips for comparing large JSONs:
- Format the JSON first for better readability
- Consider comparing specific sections if possible
- Use a text editor for files over 10MB
- Ensure JSON is valid before comparing

What about nested objects and arrays?

The tool fully supports nested structures:

Nested Objects:
- Compares properties at all levels
- Shows the full path to changed properties
- Handles deeply nested structures

Arrays:
- Detects added and removed elements
- Compares array elements
- Shows index positions of changes
- Handles arrays of objects

The diff viewer maintains the hierarchy so you can see exactly where in the structure each change occurred.

Is my data safe?

Yes, your data is completely safe:

- All comparison happens in your browser
- No data is sent to any server
- We don't store or log any JSON data
- Works completely offline after page load
- No tracking or analytics on your data

You can verify privacy by checking your browser's network tab - no requests are made when comparing JSONs.

Key Features

• Compare two JSON objects
• Detect added properties
• Detect removed properties
• Detect modified values
• Highlight differences with colors
• Show before/after values
• Support nested objects and arrays
• Handle large JSON files
• Validate JSON syntax
• Swap JSON positions
• Copy differences to clipboard
• Dark mode support
• 100% client-side processing - data never leaves your browser
• Works offline after initial load
• Mobile-friendly responsive design