Why did reordering keys produce an empty diff?

Objects are compared by key name. Insertion order is ignored on purpose.

How are arrays compared?

By index. An item inserted at the front marks every later index as modified or shifted. This tool does not align arrays by id.

No. The summary names both the value and its JSON type.

JSON Diff Checker

See what was added, removed, or modified between two JSON values. The comparison walks objects and arrays instead of lining up raw text.

Original JSON

Revised JSON

Structural diff

modified
$.version
1 → "1"
added
$.tags[2]
"csv"

2 structural changes.

Modified $.version: 1 (number) → "1" (string)
Added $.tags[2] = "csv"

Object key order is ignored. Arrays are compared by index.

2 changes · key order ignored · arrays by index

How to use it

Paste the original JSON on the left and the revised JSON on the right.
Fix either side if the validator reports a line and column.
Read added, removed, and modified paths. Copy or download the summary.

Common mistakes

Array items are paired by index, not by an id field.
Reordering object keys does not show up as a change.
Text formatting differences disappear after both sides parse.

Examples

Key order is not a change

{ "z": 1, "a": 2 }
{ "a": 2, "z": 1 }

These objects have no structural difference.

Types stay distinct

{ "n": 1 }
{ "n": "1" }

The path $.n is modified because number 1 and string "1" are different.

Frequently asked questions

Processing stays in this browser tab. What you paste is not uploaded, and this tool does not write it to local storage.