JSON diff / compare

Paste two JSON documents and see exactly what changed — added, removed and changed keys, order-independent, colour-coded, with counts. Everything runs in your browser. Nothing is uploaded.

Original (A)

Changed (B)

Ignore array order Match array items by value instead of position — reorders count as no change.

Both JSON documents are compared on your device. No upload, no sign-up.

How it works

STEP 1

Paste both JSON documents

Drop your original on the left and the new version on the right. Each side is parsed and validated as you go.

STEP 2

Compare

Hit Compare and the tool walks both trees key-by-key — order does not matter — and marks every difference.

STEP 3

Read & save the diff

See added, removed and changed keys in a colour-coded tree with counts, then copy or download the report. Nothing is uploaded.