How UnsentPDF keeps your files private

UnsentPDF edits PDFs inside your browser tab. Your documents are never uploaded, so there is nothing on a server to leak, sell or hand over.

How it works

• The site is a set of static files. When you open a PDF, your browser reads it from your disk into the tab’s memory and does every edit there.
• The page carries a strict security policy that forbids it from contacting any other website. Automated tests check that opening, editing and saving a file makes no network requests at all.
• Saving creates the new file in your browser and hands it to your downloads. It never passes through a server.
• No accounts, no cookies, no analytics, no advertising.
• After the first visit the app is stored by your browser, so it also works with no internet connection.

Check it yourself

1. Open UnsentPDF, then disconnect from the internet (or switch on flight mode).
2. Open, edit and save a PDF. Everything still works, because nothing needs the network.
3. For more detail, open your browser’s developer tools, go to the Network tab and watch: working on a file adds no requests.

What we cannot see, and what others can

• The host (Cloudflare Pages) serves the app’s files, so like any website it receives ordinary request details such as your IP address and browser. It never receives your documents.
• Cloudflare also asks Chrome-based browsers to report failed attempts to load the site’s files (“network error logging”). Such a report names the page address and the error, never a document. We cannot switch this off on the free address.
• Browser extensions you have installed can read web pages, including this one. That is outside our control.

Open UnsentPDF Free · no account · nothing is uploaded