JSON Compare
Compare two JSON documents line by line and see exactly what changed.
Compared line by line, live as you type. This is a plain text diff — pretty-print both sides first (with JSON Prettifier) if formatting differences shouldn't count as changes.
What is JSON Compare?
Paste two versions of a JSON document and see a line-by-line diff — useful for reviewing an API response change or spotting what a script modified. A common use case: comparing an API response before and after a backend change, or checking what a data migration script actually altered. The diff runs entirely in your browser, so nothing you paste — including a real API response — is sent to a server.
FAQ
No — this is a plain text diff. Pretty-print both sides first (with JSON Prettifier, using the same indent setting) if you want formatting differences to not count as changes.
No — the diff is computed entirely client-side in your browser.