Protect PDF
Your Documents, Your Control
Encrypt PDF documents by adding password, redacting, with security space, and adding watermark feature.
Support: Windows · macOS · iOS · Android
Make PDF Protected in 5 Reliable Options
Password Protect Your
PDFs from Opening
Set open password to protect your documents against unauthorized access.
How to Lock PDFs from Opening-
2 Encryption Ciphers
AES ｜ RC4
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3 Encryption Levels
128-bit RC4 ｜ 128-bit AES ｜ 256-bit AES
Password Protect PDF from
Copying, Editing, Printing
Define permissions to limit others from editing, printing, commenting on your documents, and more.
How to Add Editing Permission to a PDF-
3 Printing Permissions
Printing disallowed, low-RES, high-RES
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6 Editing Permissions
Deny edits, page management, copying, form-filling, signing, etc.
Redact PDF for Protecting
Sensitive Information
Permanently black out or white out pages or key phrases in PDF to protect sensitive information.
How to Redact a PDF Buy NowKeep Files Hidden and Secure on iPhone and iPad
Secure private files in UPDF's security space with password or Face ID on iPhone or iPad.
How to Add Files to Security Space-
All Files Accepted
Documents, audios, videos, images, etc.
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3 Encryption Options
Password & Face ID & touch ID
Protect PDF with Watermarks
Watermark PDFs for copyright protection, status marking, and prevention of unlawful use.
How to Add Watermarks to a PDF-
3 Watermark Types
Add text, image or PDF as watermark
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8 Tiled Options
Adjust tile spacing and angle as needed
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∞Watermark Possibilities
Design custom watermarks instantly with AI
Tips and Tricks for How to Read PDF Files Explore More
Other Features of UPDF
UPDF is an all-in-one PDF solution - here are some other great features: