Protect PDF
Set a password. Fast, free and secure — right in your browser.
Drag & drop your file hereor click to browse from your device
PDF files · Max 50 MB
How to Protect PDF
No installs, no accounts — just three steps.
Upload your file
Drag your PDF file into the box above, or click to browse.
Adjust the options
Pick the settings you need — or just keep the smart defaults.
Download the result
Press process and save your finished file in a couple of seconds.
Private & secure
Encrypted transfer, and files auto-delete after 30 minutes.
Lightning fast
Most files are processed in just a few seconds.
Free forever
Every tool is free, with no sign-up and no limits.
Any device
Works in any browser on desktop, tablet or phone.
Frequently asked questions
Everything you need to know about Protect PDF.
How do I password-protect a PDF?
Upload your PDF, set a password, and download an encrypted file that requires the password to open.
What encryption is used?
Your document is protected with standard PDF password encryption so only people with the password can open it.
Is Protect PDF free to use?
Yes. Protect PDF is completely free — no account, no software to install, and no watermark added to your files.
Are my files safe and private?
Your files are uploaded over an encrypted (HTTPS) connection, processed on our servers, and automatically deleted 30 minutes after processing. We never open, share, or keep copies of your documents.
Do I need to install any software?
No. Protect PDF runs entirely in your web browser and works on Windows, Mac, Linux, and mobile devices. There is nothing to download or install.