Privacy Policy
Last updated: February 22, 2026
DiffCheck (https://text-diff-checker-ebon.vercel.app) is a free, client-side diff tool. This policy explains what data we collect and how we use it.
Your text is never sent to us
All diff computation happens entirely in your browser using JavaScript. The text you paste into DiffCheck is never transmitted to any server, never stored, and never logged. We have no access to it whatsoever. This applies to all content — source code, documents, credentials, contracts, or any other text you compare.
Advertising — Google AdSense
DiffCheck uses Google AdSense to display advertisements. Google AdSense may use cookies and web beacons to serve ads based on your prior visits to this site and other sites on the internet. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to this site and/or other sites on the Internet.
You may opt out of personalized advertising by visiting Google Ads Settings. Alternatively, you can opt out of a third-party vendor's use of cookies for personalized advertising by visiting aboutads.info.
For more information on how Google uses data when you use our site, see How Google uses information from sites or apps that use our services.
Cookies
DiffCheck itself uses one functional cookie: your dark/light mode preference, stored in localStorage on your device. This never leaves your browser and is not shared with anyone.
Google AdSense may set additional cookies for ad serving and personalization. These are governed by Google's privacy policy.
Analytics
We may use analytics services (such as Google Analytics) to understand aggregate site traffic — pages visited, session duration, and similar non-personal metrics. If used, this data is collected anonymously and is not linked to any personally identifiable information.
Third-party links
This site may contain links to external websites. We are not responsible for the privacy practices of those sites and encourage you to review their privacy policies.
Children's privacy
DiffCheck is not directed at children under 13 and does not knowingly collect personal information from children.
Changes to this policy
We may update this Privacy Policy from time to time. The "Last updated" date at the top of this page will reflect any changes. Continued use of DiffCheck after changes are posted constitutes your acceptance of the updated policy.
Contact
If you have questions about this Privacy Policy, you can reach us through the contact information on our About page.