Data

JSON Diff Online

Compare two JSON documents and find added, removed, and changed values instantly. Your JSON is processed locally in your browser and never uploaded.

100% browser-only

Tool Workspace

Your JSON is processed locally in your browser and is never uploaded to a server.

Result

Waiting to start

Paste two valid JSON documents, then select Compare JSON.

Privacy Notice：Your files are processed locally. They are never uploaded.

About this tool

Compare JSON structures for API work, configuration reviews, test data validation, and version checks without sending either document away from your browser.

What is JSON Diff?

JSON Diff compares two JSON documents structurally, marking added, removed, changed, and unchanged fields with their corresponding JSON Paths.

How are objects and arrays compared?

Object key order does not create a difference. Arrays are compared by index, so a different order is treated as a change in this first version.

How to use this tool

  1. Paste the original JSON on the left.
  2. Paste the modified JSON on the right.
  3. Select Compare JSON to inspect the structured result.

Private, local processing

Your JSON is processed locally in your browser and is never uploaded, included in a URL, or sent to analytics.

Frequently asked questions

Will JSON Diff upload my data?

No. All JSON comparisons run locally in your browser.

Does a different JSON key order count as a difference?

No. Object key order does not affect the comparison.

Does array order count as a difference?

Yes. This version compares arrays by index.

Can I compare large JSON documents?

Yes, within your browser's available resources. Large documents may require more memory and processing time.

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