Password protect a PDF
Add a password to a PDF so it can only be opened with that password. Also choose whether printing or copying is restricted. Everything local, no upload.
Choose your PDF
Drop here or click to choose
Files stay on your device — nothing is uploaded
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Your file is processed in your browser and never uploaded.
How does it work?
- 1
Choose your PDF
Drag the PDF here.
- 2
Choose a password
Enter a password and confirm it.
- 3
Choose restrictions (optional)
Restrict printing or copying of text.
- 4
Protect & download
Download the protected PDF immediately.
Frequently asked questions
Is the protection secure?
Yes, the PDF is encrypted with AES-128. This is the standard PDF encryption supported by all major PDF readers.
What if I forget the password?
There is no way to recover a password. Keep it safe.
Can I remove the protection later?
Yes, use the "Unlock PDF" tool with the correct password.
Are my files uploaded?
No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.
Is it free?
Yes, completely free, without watermark or account. The site is paid for by ads.
More reading
Why in the browser?
PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.
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