JSON Diff
Compare two JSON objects and highlight the differences.
Left Side (Original)
Right Side (Modified)
About JSON Diff
JSON Diff takes two JSON documents and shows you exactly what changed between them — added keys, removed keys, and modified values are all highlighted clearly. This is invaluable when reviewing API response changes, debugging configuration drift, or comparing data exports from different environments. The diff is structure-aware, so formatting differences do not create false positives.
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Frequently Asked Questions
Is JSON Diff free?
Yes, completely free. No signup, no account, no usage limits. Use it as much as you need.
Is my data secure?
All processing happens directly in your browser using JavaScript. Your data is never sent to any server, stored, or shared. It stays entirely on your device.
Does key order affect the diff result?
No. JSON Diff compares objects semantically, so two objects with the same keys in different order are considered identical.
Can I diff deeply nested JSON?
Yes. The diff is fully recursive and will detect changes at any depth in the structure.