JSON Diff Checker
Compare two JSON documents and see exactly what was added, removed or changed.
Spotting the change in structured data
Comparing two JSON documents by eye is nearly impossible once they grow, especially when key order differs but the data is the same. This compares them structurally — matching by keys and paths rather than raw text — and highlights the real differences: which fields were added, which removed, which values changed.
Paste the two JSON documents and the differences are shown.
Structural, not textual
The important thing is that a good JSON diff ignores things that do not matter, like the order of keys or whitespace, and focuses on what does — the actual data. A plain text diff would flag two identical objects as different simply because their keys were listed in a different order, which is noise. Comparing structurally is what makes the result trustworthy for checking an API response against an expected one, reviewing a config change, or confirming two payloads truly match.
Common questions
How is this better than a plain text diff?
It compares structurally, ignoring key order and whitespace, so it shows real data changes rather than noise from reformatting.
What does it show me?
Which fields were added, removed or changed between the two JSON documents.
Is my JSON uploaded?
No. The comparison happens in your browser.