How do I compare JSON online?

Paste the original JSON on the left and the new JSON on the right. The diff updates as soon as both sides are valid.

Is this JSON diff free?

Yes. The browser-based JSON Diff tool is free and does not require an account. Monitoring live APIs over time is what APIDiffGuard productizes.

What is the difference between a JSON diff and API monitoring?

A JSON diff compares two static payloads once. APIDiffGuard captures a baseline response, re-checks the endpoint on a schedule, and alerts when the live response drifts.

Tools/JSON Diff

Free JSON Diff Online

A free online JSON Diff compares two JSON documents side by side and highlights added, removed, and changed fields with severity. APIDiffGuard uses the same engine for live API baselines and breaking-change checks.

Schema only

Limit 2.0 MB / side · warn at 1.0 MB

Original JSON104 B

New JSON109 B

3 changesBreakingWarningInfo1 added · 1 removed · 1 changed104 B + 109 B · diff <1 ms

Changes

Original

··3 changes

root{…}

data{…}

name:"Alex Rivera"

role:"admin"

pagination{…}

per_page:20

New

··3 changes

root{…}

data{…}

full_name:"Alex Rivera"

role:"admin"

pagination{…}

per_page:25

FAQ

How do I compare JSON online?: Paste the original JSON on the left and the new JSON on the right. The diff updates as soon as both sides are valid.
Is this JSON diff free?: Yes. The browser-based JSON Diff tool is free and does not require an account. Monitoring live APIs over time is what APIDiffGuard productizes.
What is the difference between a JSON diff and API monitoring?: A JSON diff compares two static payloads once. APIDiffGuard captures a baseline response, re-checks the endpoint on a schedule, and alerts when the live response drifts.