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Quick Answer

Our free JSON comparison tool highlights differences between two JSON objects. See added, removed, and modified keys and values with semantic diff that understands JSON structure.

How It Works

Paste your original JSON in the left pane

Paste the modified JSON in the right pane

View semantic differences highlighted

Expand/collapse nested structures to navigate

Key Facts

Semantic JSON comparison (not just text diff)
Identifies added, removed, and modified values
Handles nested objects and arrays
Collapsible tree view for large JSON
Ignores formatting differences
Works with any valid JSON

Frequently Asked Questions

What makes this different from text diff?

Our tool understands JSON structure, so it compares actual values regardless of formatting, whitespace, or key ordering.

Can I compare API responses?

Yes, paste API responses to see what changed between versions, including nested objects and arrays.

How are arrays compared?

Arrays are compared element by element. Added elements show in green, removed in red, and modified elements show both old and new values.

Is there a size limit?

The tool handles JSON of reasonable sizes (up to several MB). Very large files may be slow to process in the browser.