Privacy Policy

Last updated September 22, 2026.

This policy explains what happens to your data when you use File-Extension.com ("we", "this site"). We've kept it specific to what this site actually does, rather than generic boilerplate.

The file-inspection tools: nothing is uploaded

Every tool on this site (the DLL header reader, the ZIP/APK browser, the PDF viewer, and all the others) runs entirely inside your browser using JavaScript's File API. When you choose a file, it is read locally on your device to be displayed to you — it is never transmitted to our servers or to any third party. We have no record of which files you've opened or what was inside them, because that data never leaves your device in the first place.

Cookies and similar technologies

We use a small number of cookies and browser storage items:

  • Essential: a cookie recording your cookie-consent choice, so we don't ask again on every page.
  • Advertising: if you consent, Google AdSense may set cookies to serve and measure ads, including personalized ads based on your browsing. You can opt out of personalized advertising through Google's Ad Settings or the cookie banner on this site.
  • Analytics: if enabled, aggregated, anonymized analytics may be used to understand which guides are useful, so we know what to improve. This does not identify you individually.

You can withdraw or change your consent at any time by clearing your browser's cookies for this site, which will show the consent banner again.

Advertising: Google AdSense

This site is monetized using Google AdSense. Google, as a third-party vendor, uses cookies to serve ads based on your prior visits to this and other websites. 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. For more detail on how Google uses data when you use our site, see How Google uses information from sites or apps that use our services.

What we don't collect

We don't require an account, and we don't ask for your name, email address, or any personal information to use the guides or tools on this site (the sole exception is if you choose to email us directly, in which case we only have whatever you send us).

Your rights (GDPR / UK GDPR / CCPA)

If you are located in the European Economic Area, the UK, or California, you have rights over your personal data, including the right to access, correct, delete, or restrict the use of any personal data we hold, and the right to object to processing based on legitimate interest or to withdraw consent at any time. Because we collect so little personal data in the first place (see above), most of these requests will simply involve confirming we hold nothing beyond aggregated, anonymized analytics. To exercise any of these rights, contact us at the address below.

Children's privacy

This site is not directed at children under 13 (or the relevant minimum age in your jurisdiction), and we do not knowingly collect personal data from children.

Changes to this policy

We may update this policy as the site or applicable law changes. The "Last updated" date at the top of this page reflects the most recent revision.

Contact

Questions about this policy or a privacy request: contact@file-extension.com.