JSON Diff Tool
Compare two JSON values structurally — see exactly what was added, removed, or changed, with full key paths.
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How to use JSON Diff
- Paste the original JSON on the left.
- Paste the new JSON on the right.
- Click Compare to see the structural diff.
What is JSON Diff?
Useful for comparing API responses across deploys, diffing config files, or reviewing JSON-formatted changes. Output groups changes by type with color coding: green for adds, red for removes, yellow for changes.
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FAQ
- How are arrays diffed?
- Position-based — items at the same index are compared, mismatched lengths show as adds/removes at the end.
- Is my JSON data kept private?
- Absolutely, all diffing happens client-side in your browser, so your data is never uploaded or stored on servers.
- How does it handle very large JSON files?
- Processing is local, so it depends on your device; very large files may cause performance issues but remain private.
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