JSON Compare Online

Put the earlier document in Original JSON and the newer document in Updated JSON. Select Compare to see an equal flag, a change count and a list of differences. For example, changing {"version":1} to {"version":2} produces a changed entry at /version with before 1 and after 2. Reordering properties or changing indentation alone produces no difference.

Each report path identifies a location using JSON Pointer notation. /user/name points to the name property inside user, while /items/0 points to the first array element. A literal slash in a property name becomes ~1 and a tilde becomes ~0, so names containing punctuation remain unambiguous. A missing property is different from a property whose value is null.

Arrays are compared by position. Swapping two records therefore changes their indexed locations even if the same records are present elsewhere. This works for ordered lists and API fixtures. It does not match records by an id field or calculate the smallest edit sequence. If order is irrelevant to your application, sort both arrays consistently before comparing them.

Each input accepts up to 100,000 characters, 20,000 parsed values and 100 nesting levels. Integers outside JavaScript’s safe integer range are rejected; quote exact identifiers before comparison. Decimal numbers use JavaScript number precision, and duplicate object keys keep their final value. The result is a diagnostic report, not an executable JSON Patch document or a schema validator.