How to Use 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.
Open the JSON Diff Checker tool →What is JSON Diff Checker?
Compare two JSON documents and see added, removed and changed values by path. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use JSON Diff Checker
- Open the JSON Diff Checker tool.
- Paste or type your input.
- Set any options provided.
- Copy the result. Everything runs in your browser — nothing is 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.
Ready to try it?
Open JSON Diff Checker →