List items are matched by id
Items are paired by their id, by a key you choose, or by a key found for you. A list in a new order shows no changes, and a changed item shows only its changed fields.
jsonloupe
Compare two JSON files
Paste the older JSON and the newer JSON, and see exactly which values were added, removed or changed — by path, not by line.
Moved one item to the top of a list? A line-by-line diff marks the whole list as changed. This one matches items by their id.
0 bytes uploaded · no account · free
Paste two JSON documents
nothing leaves this tab
you can also compare against a file, or against an earlier document you opened
⌃↵ to compare
The three things that make most JSON diffs noisy
Ignore the fields that always change
Timestamps and request IDs differ on every run. Ignore them by name or by path, and only the real changes are left.
Long IDs are compared exactly
Two IDs that differ only in the last digit are different. A diff that rounds both to the same number tells you they are equal.
Changes by path
Every change is listed with its exact path, for example $.orders[3].total. Click a change to see it in the tree, next to the values around it.
changed $.orders[3].total 41.90 → 44.90
added $.orders[7]
removed $.customer.fax
Large files too
The comparison runs in the background, away from the page you are looking at, so two large files can be compared without freezing the tab.
match by id
ignore fields
exact numbers
Why nothing is uploaded
The comparison runs inside this browser tab. Both files are read here and nowhere else. There is no server to send your file to, which is why it keeps working with your wifi off. Nothing is logged, counted, or kept anywhere but your own computer.
bytes uploaded0
account needednone
works with wifi offyes
pricefree · MIT