Encrypt PDF

Encrypt a PDF document with a unique passport to protect your privacy

Select PDF file
or drop PDF file here

How to Password Protect a PDF File?

Upload Your PDF

Upload or drag & drop it above

Set PDF Encrypting Password

Add password to PDF and wait for the PDF encryption in seconds

Download the PDF

Free download to get the password-protected PDF file

How ONPEDF Excels in Password Protection for PDF?

Our PDF password-protecting tool highly assures users' personal privacy and aims to secure PDFs with passwords to safeguard sensitive data and information.

Mighty PDF Password Protection

Set unique password to lock down your PDF documents and prevent unauthorized access

Increase PDF File Security

Password protecting PDFs is vital especially when they contain sentive information like financial data and personal identity info. By adding a password to your PDF, you can enhance privacy and restrict access to only those who know the password.

Strict Protection with Your Passwords and Files

All your PDF files and passwords are well procted with secure SSL connections on ONEPDF. The uploaded documents and passwords will be instantly deleted once the platform is closed.

User-friendly Encrypting Process

Encrypting PDF files on ONEPDF is easy and straightforward, allowing users to apply encryption and password protection without any trouble.

Frequently Asked Questions

How secure is PDF encryption? Can it be hacked or bypassed?
Hacking or bypassing an encrypted PDF is barely possible. ONEPDF applies secure SSL connections to keep your password and file safe during password protection. You can be assured of high security by locking your PDFs on ONEPDF.
    Can I encrypt only certain pages or sections of a PDF file?
    • Unfortunately no. Currently, users can only add passwords to a complete PDF. If you want to encrypt specific pages or sections, we recommend you split the PDF first.
    Does ONEPDF store the password I set for the PDF file?
    No, we will keep neither your passwords nor PDF files on our server. All your PDFs will be instantly deleted once you log out or close the platform. Please read our privacy policy for more details.
      What happens if I forget the password for an encrypted PDF?
      • You will be not able to access the PDF if you forget the password or with the wrong one. PDF encryption is designed to protect sensitive or private information. When a PDF is encrypted, the content is scrambled by ONEPDF's cryptographic algorithm, and hence, a correct password is required to unlock and view the content.
      • Here're a few possible solving methods:
      • 1. Try to recall or reconstruct the password
      • 2. Seek assistance from the PDF creator
      • 3. Use password recovery tools
      • 4. Start over to remake the content
      Can encrypted PDF files be opened on different devices and platforms?
      • Absolutely! Encrypted PDF files can be opened on different devices or platforms as long as they are equipped with a PDF reader or a web browser.
      • However, to successfully view or edit a password-protected PDF document, you will need to type the correct password to unlock the file.
      Is it possible to remove encryption from a PDF file?
      Removing encryption from a PDF file or unlock a PDF can be easy as long as you have access to the correct password. Otherwise, it can be hard to remove password.