Does key order count as a change?

Not after Format JSON & sort keys: both sides are sorted A–Z, so reordered keys line up and only real changes show.

What kinds of JSON work?

API responses, config files, package.json, translation files and any other JSON, up to hundreds of thousands of lines.

No. Everything happens in this tab; nothing is sent anywhere.

Compare two JSON files and see every changed key and value. Format and sort keys in one click, so only real changes show.

a: emptyb: empty

original0 lines

changed0 lines

Paste or drop something into a and b, and the differences show up here.

1
Paste or drop both files
Put the old JSON on the left (a) and the new JSON on the right (b). Files are read on your machine, never uploaded.
2
Format and sort keys
Minified JSON and keys in a different order would otherwise look like changes. Format JSON & sort keys pretty-prints both sides with keys A–Z, leaving only real differences.
3
Read the changes
Changed values are marked word by word, added keys in green, removed keys in red. Invalid JSON is flagged with the exact line and column.

Does key order count as a change?: Not after Format JSON & sort keys: both sides are sorted A–Z, so reordered keys line up and only real changes show.
What kinds of JSON work?: API responses, config files, package.json, translation files and any other JSON, up to hundreds of thousands of lines.
Is my JSON uploaded?: No. Everything happens in this tab; nothing is sent anywhere.