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JSON Compare & Diff Checker

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About JSON Compare & Diff Checker

How do I compare two JSON files?

Using our JSON diff tool is simple:

  • Paste or upload your original JSON in the left panel
  • Paste or upload the modified JSON in the right panel
  • Click the "Compare JSON" button
  • View the highlighted differences side by side

What do the colors mean?

The diff results use color coding to indicate changes:

  • Green lines (+) - Lines that were added in the modified JSON
  • Red lines (-) - Lines that were removed from the original JSON
  • Gray lines - Lines that remain unchanged

How does the comparison work?

The tool first formats both JSON documents with consistent indentation, then performs a line-by-line comparison. This approach makes it easy to see exactly where changes occurred.

Can I compare large JSON files?

Yes, you can compare JSON files up to 10MB each. The comparison runs entirely in your browser, so performance depends on your device.

What if the JSON is invalid?

If the JSON is invalid, the tool will show an error message above the editor in real-time. In Chrome and Firefox, you can click "Locate in editor" to jump directly to the error location.

Is my data safe?

Your JSON data never leaves your browser. All comparison and processing happens locally on your device.