Privacy Policy

Last updated: July 2026

Overview

FreeJSON.online (hereinafter referred to as "this website") takes user privacy seriously. This privacy policy aims to clearly and transparently explain how we handle data when you use this website.

Data Collection

What do we collect?

We do not collect any user data. This website has no user registration, no backend database, and does not use any analytics or tracking tools (such as Google Analytics).

Local Processing

All JSON data you enter on this website is processed locally in your browser and is never uploaded to any server. Formatting, validation, compression, conversion, diff comparison — all operations are performed entirely on your own device. You can verify this by disconnecting from the network — all tools will still work.

Local Storage

This website uses browser local storage (localStorage / Cookie) to save the following purely functional preferences. This data is stored only on your device and is never transmitted to anyone:

  • Theme preference: Records your chosen light/dark theme mode to maintain a consistent display on your next visit.

You can clear this data at any time in your browser settings.

Third-Party Services

This website does not use any third-party tracking, advertising, or analytics services. JavaScript libraries are loaded via CDN, and you can review these publicly available open-source codebases yourself.

Data Security

Since all data is processed locally in your browser without any network transmission, there is no risk of server-side data breaches. Nevertheless, we recommend avoiding processing sensitive data on public or shared devices, and closing browser tabs after use to clear data from memory.

Policy Changes

If this privacy policy undergoes significant changes, we will update the content on this page and update the 'last updated' date. Since this website does not collect user contact information, we cannot notify users individually. We recommend checking this page periodically.

Contact Us

If you have any questions or suggestions about this privacy policy, please feel free to contact us at contact@freejson.online.