Your PDFs never leave your device.
This is not a policy promise about deleting files after processing. There is no upload step, no processing server and no storage to delete from.
Last updated 13 November 2026
The short version
If you only read one paragraph, read this one: the site is static files. Files you choose are read by JavaScript in your browser and compressed there. Nothing about the document is sent over the network.
What happens to your PDF
- The browser reads the file from disk into this tab’s memory.
- A Web Worker parses and rebuilds it locally; images are re-encoded on a canvas.
- The result becomes a temporary in-browser URL, used only for the download link.
- Closing the tab releases the memory. Nothing persists anywhere else.
What we do not do
- No file uploads, at any point
- No accounts or sign-up
- No email collection
- No analytics or tracking scripts
- No cookies set by this site
- No advertising pixels
- No server-side logs of file contents
- No watermarks or injected pages
How to verify it yourself
Load this page, then open your browser’s DevTools and switch the Network tab to “Offline”. Drop a PDF and compress it. It still works, because no request is needed. You can repeat the test with the network panel open: you will not see a request that contains your file.
Third-party resources
Fonts are self-hosted and served from this domain. The PDF libraries are bundled with the site rather than loaded from a CDN. That keeps the site functional offline and means no third party sees your requests.
Metadata removal
By default the compressor strips document metadata such as author name, software, creation timestamps and XMP packets. You can turn this off in the advanced options if you need to preserve it.
Questions
If something here is unclear, write to privacy@compresspdfai.com.