Encrypt PDF
Password-protect a PDF with optional permission restrictions.
About Encrypt PDF
Encrypt PDF locks a document behind a password and can optionally restrict what readers are allowed to do, like printing or copying. Use it before sending anything sensitive over email or a shared drive. The encryption is applied in your browser, so the unprotected file and your password never travel to a server.
- Category
- optimize
- Input
- Accepts: application/pdf.
- Output
- Outputs: application/pdf.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Password-protect a payslip or tax document before emailing it to an accountant
- Lock a confidential proposal so only the intended recipient with the password can open it
- Restrict printing and copying on a distributed report to discourage redistribution
- Secure scanned ID or medical documents before uploading them to a portal
- Add a password to a signed contract archived in shared cloud storage
Frequently asked questions
Does my file or password get uploaded?
No. Encryption runs entirely in your browser — neither the PDF nor the password leaves your device.
What can the password restrict?
Beyond requiring a password to open, you can optionally restrict permissions such as printing and copying.
Can I remove the password later?
Yes, with Decrypt PDF, provided you know the password.
Will the recipient need special software?
No. Standard PDF readers prompt for the password and respect the permission settings.
Is the original unprotected file kept?
Your source file is untouched; the tool outputs a new, encrypted copy for you to share.
Keywords
- encrypt
- password
- protect
- security