JSON Diff
Compare JSON files instantly. Free online JSON diff tool with side-by-side view and highlighting. No data leaves your device.
About
Comparing JSON manually is error-prone. A JSON diff tool highlights differences between two versions-added, removed, and changed keys and values.
Useful when comparing API responses before and after changes, validating config migrations, or reviewing schema updates. Side-by-side diff shows exactly what changed.
Use cases: API version comparison, config migration checks, schema evolution, debugging state changes. Paste two JSON blobs, get a clear diff. Runs locally.
Example
Input
Original: {"a":1} | Modified: {"a":2,"b":3}Output
Side-by-side diff with highlighted changes.
Use cases
- Compare API responses
- Validate config migrations
- Review schema changes
- Debug state differences