JSON Patch

What is JSON Patch?

JSON Patch Cleaner is a free, browser-based tool that helps you tidy up and standardize messy datasets. Apply an RFC 6902 JSON Patch (add/remove/replace/move/copy/test). It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

Used by

• Developers
• Data engineers
• QA engineers
• Students
• Data cleaning teams
• Analysts

Recommended workflow

1. 1

   Prepare the input

   Clean obvious quality problems before analysis, imports, dashboards, or automation.

2. 2

   Run JSON Patch

   Review the preview, copy or download the result, and keep everything local in your browser.

3. 3

   Next recommended tool

   JSON Pointer Builder: Resolve an RFC 6901 JSON Pointer against a document.

   Open tool
4. 4

   Then continue with

   JSONPath Tester: Query JSON with JSONPath — child, index, wildcard, recursive.

   Open tool
5. 5

   Then continue with

   JSON Merge: Deep-merge two or more JSON documents with conflict policy.

   Open tool

Frequently asked questions

How do I use JSON Patch?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Apply an RFC 6902 JSON Patch (add/remove/replace/move/copy/test).

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is JSON Patch Cleaner free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.