Konvizi
Free No upload
Add a password to your PDF: it will be needed to open the document. Nothing is uploaded.
Drop your PDF files here
or
Your files stay on your device
Konvizi’s “Protect PDF” tool is free, with no sign-up, no watermark and no file limit. All the processing happens in your browser, on your device: your files are never uploaded to a server, which makes it suitable for personal and confidential documents.
Drag your PDF files into the area above or click “Choose files”.
Type the password, then click “Protect”. The encryption is done by your browser.
The new file asks for the password when opened, in every recent PDF reader.
A payslip, a bank statement or an ID document sent by email can be read by anyone with access to that mailbox. With a password, the content of the PDF is encrypted (256-bit AES): without it, the file is unreadable. Send the password by a different channel from the document, for example by text message.
PDF is the universal document format: it looks the same on every device, keeps its layout and prints without surprises.
Contracts, payslips, bank statements, tax returns: PDFs often hold sensitive information. With Konvizi they never leave your device, are stored nowhere and read by nobody. Most PDF tools copy pages without recompressing them: selectable text, links and quality are preserved.
Your files never leave your device. No upload, no storage.
No upload and no queue: the conversion starts right away.
As many files as you like, with no imposed size limit.
No sign-up, no watermark, no subscription.
| Konvizi | Typical online converter | |
|---|---|---|
| Where your files are processed | In your browser, on your device | On the service’s servers |
| Upload to the internet | None | Required, then you download the result |
| Storage of your files | None: nothing is stored | Stored on a server, at least while processing |
| Waiting time | Starts instantly | Upload time, sometimes a queue |
| Account | Never required | Often required beyond a few files |
| Watermark and limits | No watermark, no maximum number | Common on free plans |
Yes, completely. No sign-up, no watermark, and no maximum number of files.
No. Everything happens in your browser, on your device. Your files are never sent over the internet: nobody but you can see them.
The protected PDF can no longer be opened: Konvizi does not know your password and cannot recover it. Keep the original file, or write the password down somewhere safe.
The file is encrypted with 256-bit AES, the highest level the PDF format provides. Its strength depends mostly on the password: prefer a long phrase to a short word. A PDF that is already protected cannot be protected a second time.
Open your browser’s developer tools (F12 key), go to the “Network” tab and run a conversion: no request carries your file. The site also enforces a security rule (Content-Security-Policy) that forbids the browser from contacting any site other than konvizi.com, and konvizi.com is a static site with no service able to receive files.
Yes. Konvizi works in the browser of your phone or tablet (Safari, Chrome…) just like on a computer, with no app to install. Very large files are processed faster on a computer, which has more memory.