Protect PDF
Protect PDF files with a password. Encrypt documents to prevent unauthorized access.
Files stay on your device
or drop it here
About Protect PDF
If a PDF contains private or sensitive information, adding password protection can provide an additional layer of security. Our protect PDF tool lets you password protect PDF documents by setting a password before sharing the file. Use password protect document features when you want to restrict access, and set a password for PDF files by choosing a password and applying it to your document. Simply upload your file and add a password to the PDF before downloading the protected version.
How to protect pdf
- 1Upload your PDF file.
- 2Choose a strong password.
- 3Apply the password protection.
- 4Download the protected PDF.
- 5Share the password only with intended recipients.
Supported file types
One PDF file (.pdf) and the password you want to set.
You get back: An encrypted PDF that asks for the password before it opens.
Good to know before you start
- If you forget the password nobody can recover the file for you — store it somewhere safe.
- Encryption protects the file, not the information once a reader has opened it.
- Everything runs in your browser tab, so the practical size ceiling is your device's memory — a very large document is slower on a phone than on a laptop.
Why use this tool
Encrypt PDF file
Encrypt PDF file protection can help prevent unauthorized users from opening the document without the correct password.
Lock PDF documents
You can lock PDF files to help prevent unauthorized access to confidential reports, contracts, financial files, or personal documents.
Password protect PDF document
Use password protect PDF document functionality when preparing sensitive files for sharing. Note: password protection is not a replacement for secure storage, and the level of protection depends on the encryption method used.
Frequently asked questions
How do I password protect a PDF?
Upload your file, choose a password, apply the protection, and download the protected version.
Can I open a password protected PDF?
Yes. If you have the correct password, you can open password protected PDF documents using a compatible PDF reader.
Is password protection enough on its own?
Password protection is not a replacement for secure storage or access controls, and the level of protection depends on the PDF encryption method used.