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JSON Compare

Compare two JSON objects side-by-side and instantly find added, removed, and changed keys.

JSON A (left)

JSON B (right)

How to use:

Paste your first JSON object in the left box
Paste your second JSON object in the right box
Click Compare JSON to see differences
Added keys show in green, removed in red, changed in yellow

About JSON Compare

JSON Compare is a free browser-based tool that diffs two JSON objects and highlights every difference — added keys, removed keys, and changed values. Perfect for debugging API responses, comparing config files, or validating data migrations. Everything runs in your browser, so your data never leaves your machine.

Frequently Asked Questions

What does JSON Compare do?

It shows the differences between two JSON objects — added keys, removed keys, and changed values — side by side.

Is my data safe?

Yes. All comparison happens entirely in your browser. Your JSON is never uploaded to any server.

Can I compare nested JSON objects?

Yes. The tool recursively diffs nested objects and arrays at any depth.

What file formats are supported?

The tool accepts any valid JSON string. Paste your JSON directly into the text areas.

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About JSON Compare

Frequently Asked Questions

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You compared two files. Compare hiring a team to one $299 employee.

About JSON Compare

Frequently Asked Questions

Related Tools

JSON Formatter

Base64 Encoder/Decoder

Regex Tester

URL Encoder/Decoder

UUID Generator

Hash Generator (SHA-256)

You compared two files. Compare hiring a team to one $299 employee.