JSON Diff Tool

Compare two JSON objects and visualize their differences with detailed change tracking. Perfect for version control, API testing, and data validation.

JSON 1 (Original)
JSON 2 (Modified)0/0/0
All comparison runs locally in your browser. Your JSON is never uploaded to our servers.

What JSON Diff compares

JSON Diff parses both inputs and compares their data structure, so formatting whitespace is not treated as a meaningful difference.

The result highlights added, removed, modified, and unchanged values so you can quickly locate the part of a payload that changed.

  • Compare two API responses after a backend change.
  • Review configuration drift between environments.
  • Check generated JSON before and after a migration script.

How to interpret results

Added values exist only in the second JSON input. Removed values exist only in the first input. Modified values share a path but have different values.

When both inputs are valid JSON, the summary counts provide a quick signal before you inspect individual paths.

  • Use Show unchanged when you need full context around a modified branch.
  • Copy or download the diff output for issue reports.
  • Beautify both inputs first if you need easier side-by-side reading.

Reliable comparison workflow

Validate each JSON input first if the comparison does not run. A single syntax error prevents structural comparison.

For API debugging, keep the old response on the left and the new response on the right so additions and removals read consistently.

  • Left input is treated as the baseline.
  • Right input is treated as the changed version.
  • Use the tree viewer for deep nested inspection after identifying a changed path.

Frequently Asked Questions

How does the JSON diff tool work?

The tool compares two JSON objects field by field, identifying additions, deletions, and modifications. It provides a hierarchical view of all differences with clear visual indicators.

Can I compare large JSON files?

Yes, the tool is optimized for performance and can handle large JSON documents. The comparison happens locally in your browser for privacy and speed.

What do the different colors mean?

Green indicates added values, red shows removed values, yellow highlights modified values, and gray represents unchanged values.

Is my data secure?

Absolutely! All processing happens locally in your browser. No data is sent to our servers, ensuring complete privacy and security.

Can I export the diff results?

Yes, you can copy the diff results to clipboard or download them as a JSON file for further analysis or documentation.

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