PDF Tools

With most of them the document is uploaded to a server, processed there, and deleted on a stated schedule you have to trust. Free use is usually capped, and the caps surface as a blocked export, a file-size rejection, or a sign-up form. These tools process the file in your browser and never transmit it, so confidentiality does not depend on anyone's retention policy.

Open the merge tool, add your files, and download the result. The files are read by your browser and combined on your device, so nothing is sent anywhere. This also works on a locked-down work laptop that blocks file uploads, because no upload ever takes place.

No. There is no upload step, so there is no copy on any server to store, read, or lose. Your file is opened by the browser, changed on your device, and saved straight back to your downloads. Closing the tab clears it from memory.

Yes. No account, no watermark, no daily limit, and no paid tier that unlocks a higher-quality version of the same export. What you download is the full-quality file.

No limit is set here, because there is no server to protect with one. The practical ceiling is your device's memory, since the whole document is held in the browser while you work on it. Large scans running to hundreds of pages are where an older phone reaches that ceiling.

Once a tool page has loaded, the work itself needs no connection. A few tools fetch a resource the first time they run, such as the language data used for text recognition, so those need a connection once. The processing stays on your device either way.

No. Everything runs in a normal browser on a phone, tablet, or computer. There is nothing to install, no extension, and no account to create. Choose the tool you need, add your file, and download the result.