PDFbolt — Free online PDF tools
Protect PDF
Add a password to open or change the file.
Sensitive documents should not be readable by anyone who happens to receive the file. Protecting a PDF with a password encrypts it so only people who know the password can open it.
Set a strong password, and PDFbolt produces an encrypted copy you can share with confidence.
How to password-protect a PDF
- Choose the PDF you want to protect.
- Enter the password that will be required to open it.
- Run the tool.
- Download the password-protected PDF.
Frequently asked questions
What if I lose the password?
The document cannot be opened or recovered without it, so store it safely.
How should I share the password?
Send it separately from the file, for example by message or phone.
All PDF tools (HTML index) · Browse all PDF tools · PDFbolt home