Does the diff care about key order?

Both sides are formatted consistently before comparing, so differences reflect actual structural or value changes, not just line-level text differences from re-ordering during formatting.

What if one side has invalid JSON?

The tool tells you specifically whether the left or right JSON failed to parse, rather than a generic error.

JSON Diff Checker

Compare two JSON documents side by side and see exactly what changed.

Original JSON

{

"name": "Ada",

"role": "Engineer",

"active": true

}

Changed JSON

{

"name": "Ada",

"role": "Senior Engineer",

"active": true,

"team": "Platform"

}

Your file never leaves this browser tab — everything runs locally on your device.

How to use json diff checker

Paste the original JSON on the left and the changed version on the right.
Click "Compare".
Review the line-by-line diff — added lines in green, removed lines in red.

Common use cases

Reviewing what changed between two versions of an API response.
Debugging why a config file behaves differently after an edit.
Comparing test fixtures or snapshots during development.

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