Privacy Policy | Jsonr
Last updated: August 21, 2026
This Privacy Policy explains how Jsonr (www.freejsonr.com, the "Site") handles information when you use our free online JSON tools. The short version: your data never leaves your browser.
1. Your JSON Data Is Never Uploaded
Every feature on this Site — the JSON formatter, validator, compare tool, tree viewer and all converters — runs entirely as client-side JavaScript inside your web browser. The content you paste or upload is processed in memory on your own device and is never transmitted to our servers, never logged, and never stored by us.
2. Information Stored Locally in Your Browser
To improve usability we store a small number of preferences in your browser's local storage. This data stays on your device and you can clear it at any time through your browser settings:
theme— your light/dark appearance preferencelang— your selected interface language
3. Information We Do Not Collect
We do not require accounts, do not ask for personal information, and do not operate analytics that track the content you process. We have no access to the files you open with the upload button; they are read locally by your browser.
4. Cookies and Third-Party Services
The Site itself does not set tracking cookies. If advertising is displayed on the Site, ads may be served by third-party networks such as Google AdSense, which may use cookies or similar technologies to personalize or measure advertisements, subject to their own privacy policies. You can manage ad personalization through your browser settings or Google Ads Settings.
5. Children's Privacy
The Site is a general-purpose developer tool and does not knowingly collect any personal information from anyone, including children under the age of 13.
6. Security
Because all processing happens client-side over an HTTPS connection, your working data is never exposed to network transmission beyond the initial page load of the Site itself.
7. Changes to This Policy
We may update this Privacy Policy from time to time. Material changes will be reflected by updating the "Last updated" date at the top of this page. Continued use of the Site after changes constitutes acceptance of the revised policy.
8. Contact
If you have questions about this Privacy Policy, reach out through our contact page.