Protect & Manage
Protect PDF
Lock a PDF with a password before sharing. RC4 128-bit encryption, processed entirely in your browser.
How it works
Upload your PDF, set a password, and download a protected copy. Uses RC4 128-bit encryption, compatible with all major PDF readers.
Berth
PDF only · max 50 MB
How to use it
- Drop the PDF you want to protect.
- Enter and confirm a strong password.
- Click Protect and Download — your encrypted PDF saves automatically.
Common questions
Does my PDF get sent anywhere?
No. Your PDF and password never leave your browser. Encryption runs entirely client-side using JavaScript.
What encryption method is used?
RC4 128-bit encryption, which is compatible with all major PDF readers including Adobe Acrobat, Chrome, and macOS Preview.
Can I remove the password later?
Yes. Use the Unlock PDF tool to remove the password from a PDF you own. You will need the original password.
What if I forget the password?
PDFHarbor never stores your password or file, so recovery is not possible. Store it somewhere safe before sharing.
Related tools
Related guides
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