What is JSON Diff & Compare?
JSON Diff & Compare compares two JSON objects line-by-line and key-by-key, highlighting added (+), deleted (-), and modified (~) values.
How to use JSON Diff & Compare
Paste original JSON on left and modified JSON on right to view visual diff highlights instantly.
Key features
- Side-by-side visual JSON comparison
- Highlights added, removed, and changed keys
- 100% client-side operation
Common use cases
- Auditing API v1 vs v2 payload breaking changes
Technical details & standards
Traverses JSON object graphs recursively to calculate structural diffs client-side.
Frequently asked questions
Does it handle nested JSON arrays?
Yes, nested arrays and objects are traversed and compared recursively.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.