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JSON Diff

Compare two JSON objects and see exactly what changed. Added keys show in green, removed keys in red, changed values in yellow. Recursive comparison works at any nesting depth.

📄 JSON A — Original

📄 JSON B — Modified

Paste two JSON objects to compare.

When to Use JSON Diff

JSON diff is essential when debugging API responses, comparing configuration files, tracking changes in NoSQL documents, or validating that a transformation produced the expected output. Manually scanning two JSON objects for differences is error-prone — a diff tool instantly highlights what changed, what was added, and what was removed.

Frequently Asked Questions

Yes. The diff is recursive — it compares nested objects at any depth. Each change shows the full key path (e.g. user.address.city) so you can locate changes in deeply nested structures.

Yes, array elements are compared by position. Arrays with the same elements in different orders will show as changed. JSON arrays are ordered, so position-based comparison is semantically correct.

Absolutely. Paste before and after API responses to see exactly what changed between two calls. Useful for verifying PATCH requests only modified intended fields.

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What is JSON Diff?

JSON Diff is a free online utility designed to help developers, designers, and technical professionals work more efficiently. This tool runs entirely in your browser — no installation required, no data sent to any server.

How to Use JSON Diff

Paste or type your input in the editor area above.
Click the action button to process your content.
Copy the output or download the result.

Key Features

100% Free — No registration or payment required.
Client-side Processing — Your data never leaves your browser.
Instant Results — Get output in milliseconds.
No Installation — Works directly in your web browser.
Mobile Friendly — Works on phones, tablets, and desktops.

Who Uses JSON Diff?

This tool is widely used by web developers, software engineers, data analysts, students, and IT professionals who need a quick and reliable way to process data without setting up complex software environments.

Frequently Asked Questions

Is JSON Diff free to use?

Yes, JSON Diff is completely free. There are no hidden charges, no subscription fees, and no account required.

Is my data safe when using JSON Diff?

Absolutely. All processing happens locally in your browser. No data is uploaded to any server, making it completely private and secure.

Can I use JSON Diff on mobile devices?

Yes, JSON Diff is fully responsive and works on all modern browsers and devices including smartphones and tablets.

Do I need to install anything to use JSON Diff?

No installation is required. Simply open the page in your browser and start using it immediately.

How accurate is JSON Diff?

JSON Diff uses industry-standard algorithms to ensure accurate and reliable results every time.