Protect PDF
Add password protection to your PDF
Secure your PDF with a password so only authorized people can open it. Uses RC4 128-bit encryption. Processing happens entirely in your browser — your file and password never leave your device.
Drop files here or click to browse
Accepted: .PDF
How to Password Protect a PDF
Upload your PDF, enter a password (and confirm it), then click Protect PDF. The tool encrypts the file in your browser and gives you a password-protected PDF to download. Anyone who tries to open it will need the password.
Common Use Cases
- Protecting confidential business documents before sharing
- Securing tax returns, contracts, or legal files
- Adding a password before emailing sensitive PDFs
- Restricting access to personal documents stored in the cloud
Frequently Asked Questions
Related tools
Further reading
- PDF Encryption Explained: What Password Protection Actually Does (and Doesn't)PDF files support two types of passwords and multiple encryption methods. Here's what each one protects, what it doesn't, and why it matters.
- Is It Safe to Sign Documents Online? PDF Signatures and PrivacyOnline signing is legal and convenient — but 'signed' doesn't always mean 'secure,' and signing usually means uploading your most sensitive document. Here's what to know.