JSON Diff — Compare JSON Online
Find key and value differences between two JSON documents. Runs entirely in your browser.
Comparing two JSON documents by eye is error-prone once they grow beyond a few lines. Paste the original and modified JSON to see exactly which keys were added, removed, or changed — with a collapsible tree view for large documents.
FAQ
What does this tool compare?
It performs a deep recursive comparison of two JSON documents. It finds keys that exist in only one document (added/removed), values that differ at the same path (changed), and structural mismatches like type changes.
How are arrays compared?
Arrays are compared index by index. If one array is longer, the extra elements are marked as added or removed. Re-ordered elements at different indices appear as value changes.
What do the filter modes mean?
Keys shows only structural differences — keys present in one document but missing from the other. Values shows only value changes at paths that exist in both documents. Both combines them.
Is my data safe?
Yes. All processing happens in your browser — no data is sent to any server.
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