Edit & Protect
Protect PDF Online
Password-protect a PDF online with AES-256 encryption. Set and confirm a password, then download the encrypted document. Free to use, no signup.
How to password-protect a PDF
- 1
Upload the PDF you want to protect.
- 2
Enter and confirm a password you can store safely.
- 3
Download the encrypted PDF and test opening it with your password.
Require a password to open a document before you share it. Protection uses AES-256 encryption. Keep the password separately from the PDF and send it through a different channel when possible. You need to retain the password to unlock the file later.
Free to use, with temporary file storage
No account or installation is required. Uploads are limited to 10 MB per file. Your files are used to complete the job and deleted automatically after about one hour. Download links are temporary, so save your result before it expires. Read our privacy policy for details.
Questions about Protect PDF
What encryption does Protect PDF use?
The output PDF is encrypted with AES-256. Compatible PDF readers request the password before opening it.
Can Tabulyn recover a forgotten password?
No. Keep your password in a safe place. Unlock PDF requires the current password and is not a password-recovery tool.