Policy / Updated September 11, 2026
Privacy policy
Calculator inputs and selected files stay in your browser. File Preflight works without an account or server upload.
Local file processing
Image, PDF, DOCX, EPUB and TXT tools use browser memory to read and transform files on your device. File Preflight does not transmit selected files, filenames or their contents to its servers. Downloaded results and printable views are created locally, and closing the tab clears the working data from the tool.
Specifically: image tools decode and re-encode pictures with the browser’s built-in canvas APIs; PDF tools parse and write documents in the page with client-side JavaScript libraries; document tools read archives and build printable views on your device. None of these steps involve an application server owned by File Preflight.
Information we process
File Preflight may collect aggregate usage information including page views, approximate region, device category and referral source. If you separately consent to Google Analytics, we may also record the name and action of a tool used. We do not intentionally send filenames, file contents or calculator input values to analytics.
Local storage
We store your optional Google Analytics preference in the browser so the consent choice does not need to be repeated on every visit. You can clear this preference at any time by removing site data in your browser settings.
Cloudflare Web Analytics
Cloudflare Web Analytics helps us measure aggregate visits, referral sources and real-user performance. It is configured without advertising cookies and does not receive the files or calculator values you use.
Google Analytics
When configured by the site owner and accepted by the visitor, Google Analytics 4 helps us understand traffic sources and product usage. Analytics storage remains denied until consent is given. Google’s use of data, where consented, follows the Google Privacy & Terms published at policies.google.com.
Google AdSense advertising
File Preflight does not load AdSense unless a valid publisher account is configured. If advertising is enabled, Google and its partners may use cookies or similar technologies to deliver, measure and limit ads, including personalized advertising where legally permitted. A Google-certified consent management platform will be used where required, and visitors will be able to manage applicable choices. You can review Google’s advertising practices at policies.google.com/technologies/ads.
External links
Guides cite third-party references such as standards bodies and software publishers. These links open the referenced site directly; File Preflight does not control those sites and this policy does not cover their practices. Reference links are marked to open in a new tab.
Children
File Preflight is a general-audience utility and is not directed to children under 13, and we do not knowingly collect personal information from them.
Changes to this policy
If the policy changes, the updated date at the top of this page changes with it. Material changes to how data is handled will be described in plain language rather than buried.
Contact
Privacy questions can be sent to privacy@filepreflight.com.