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Password Protect PDF

Lock your PDF with a highly encrypted password to secure it from unwanted editing—no sign-up or installation needed. Protect the contents of your PDF for free and make sure no one but you can access it. Just drag & drop your file into the toolbox, choose a good password, and we'll add our military-grade encryption to secure your file.

  • TLS encryption for secure file processing
  • Password-protect your PDF with encryption
  • Quick to protect, near impossible to break
Reliable PDF password protection
Encrypt your PDF with a password to prevent unauthorized access to the file content, especially for file sharing or archiving.
Passwords and files are safe with us
All files and passwords are transferred using secure SSL connections. Files are deleted permanently after one hour. Passwords are deleted instantly after processing.
On Mac, Windows, and Linux
As a web application, we can support all platforms like Mac, Windows, and Linux. Protecting PDFs everywhere!
Secure encryption for maximum safety
There are PDF passwords that can be removed easily. We thoroughly encrypt your files so that it would take many thousands of years to crack your password with a regular computer.
A good length for a secure password
For a very secure password, we recommend using a non-dictionary word of 7 characters or more. Also include numeric characters, capital letters, and symbols.
Password-protection in the cloud
You don't have to download or install any software to set a password for your PDF. Just upload it, protect your PDF and download the encrypted file.

How to password protect a PDF document

  1. Drag and drop your PDF to the toolbox above.
  2. Enter the password you'd like to set.
  3. Click 'Encrypt PDF' to add the password to the PDF.
  4. Download your encrypted PDF file!
Rate this tool
4.2 / 5 - 13,296 votes