Protect PDF Online — Free & Secure
Encrypt your PDF with a password and permissions.
How to use Protect PDF online
- 1
Upload your files
Drag and drop or click to select your PDF file(s). Uploads go directly to encrypted cloud storage over HTTPS.
- 2
Run Protect PDF
Processing happens instantly in the cloud — no software to install, works on Windows, Mac, Linux, iOS and Android.
- 3
Download the result
Get your processed file via a secure temporary link. All files are automatically deleted within 24 hours.
Frequently asked questions
Is Protect PDF free to use?
Yes. Protect PDF is free — guests can use tools without an account, and a free Google sign-in unlocks unlimited use plus AI features.
Are my files secure?
Yes. Files transfer over HTTPS straight to encrypted cloud storage, are never shared, and are permanently deleted within 24 hours.
Do I need to install any software?
No. NexaPDF AI runs entirely in your browser on any device — nothing to download or install.
Which file formats does Protect PDF support?
Protect PDF accepts PDF files.