JSON Diff Checker
A structural JSON diff: paste two JSON documents and see exactly which keys were added, removed or changed, each with its full path — far clearer than a line-based text diff. Runs entirely in your browser.
Free · No sign-up · Updated August 2026
Compares two JSON documents structurally — reordered keys and whitespace are ignored, so you only see real differences. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
How is this better than a text diff?＋
It compares the JSON structurally, so reordered keys or reformatting don't create false differences — you see only real changes, each with its full path.
What does it detect?＋
Added keys, removed keys and changed values (including inside nested objects and arrays), with the old and new value shown for changes.
Is my data private?＋
Yes — both documents are parsed and compared locally in your browser.