What can I do with JSON Diff?

Compare two JSON documents and highlight changes. JSON Diff is part of the JSON shelf on utils.sbs and is designed for quick, one-off tasks.

Is JSON Diff free to use?

Yes. JSON Diff is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use JSON Diff?

No. JSON Diff is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

What formats does JSON Diff support?

It works with plain text, code, markup and structured text, and returns a downloadable text file.

Can I use JSON Diff on my phone?

Yes. JSON Diff is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

JSON tool

JSON Diff

Compare two JSON documents and highlight changes.

Runs on-deviceNo sign-upFree

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Workspace

JSON Diff

Runs locally

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The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

JSON Diff is a free browser-based json tool. Compare two JSON documents and highlight changes. It runs with JavaScript locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is JSON Diff?

JSON Diff is a free browser-based json tool from utils.sbs. Compare two JSON documents and highlight changes. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

Category	JSON
Input	Plain text, code, markup or JSON
Output	A downloadable text or code file
Engine	JavaScript
Processing	In your browser
Price	Free
Account	Not required

How JSON Diff works

Text is processed in the browser with JavaScript and downloaded from a local blob. Nothing is uploaded.

How to use JSON Diff

1Open JSON Diff and add your input.
2Use the default settings, or choose the format or detail level that matches your goal.
3Run the tool, check the preview or result, and download the output.

When to use JSON Diff

Clean, transform or compare text before using it elsewhere.
Convert markup, JSON or structured text between formats.
Count, format or inspect content quickly in the browser.

Limitations

Very large inputs may be limited by the browser's available memory.

Privacy and accuracy

JSON Diff processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

JSON Diff questions

What can I do with JSON Diff?
Compare two JSON documents and highlight changes. JSON Diff is part of the JSON shelf on utils.sbs and is designed for quick, one-off tasks.
Is JSON Diff free to use?
Yes. JSON Diff is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use JSON Diff?
No. JSON Diff is designed to process your input locally in the browser. Files are not uploaded to a server for processing.
What formats does JSON Diff support?
It works with plain text, code, markup and structured text, and returns a downloadable text file.
Can I use JSON Diff on my phone?
Yes. JSON Diff is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Keep going

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