Set open password to protect your documents against unauthorized access.
How to Lock PDFs from Opening2 Encryption Ciphers
AES | RC4
3 Encryption Levels
128-bit RC4 | 128-bit AES | 256-bit AES
Permanently redact pages or key phrases to protect sensitive information.
How to Redact a PDF Buy NowSecure private files in UPDF's security space with password or Face ID on iPhone or iPad.
How to Add Files to Security SpaceAll Files Accepted
Documents, audios, videos, images, etc.
3 Encryption Options
Password & Face ID & touch ID
Watermark PDFs for copyright protection, status marking, and prevention of unlawful use.
How to Add Watermarks to a PDF3 Watermark Types
Add text, image or PDF as watermark
8 Tiled Options
Adjust tile spacing and angle as needed
Tips and Tricks for How to Protect PDF Files Explore More
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Unlock all features in UPDF(excluding AI) across Windows, macOS, iOS and Android, including:
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Buy NowUnlock all features in UPDF(excluding AI) across Windows, macOS, iOS and Android, including:
Edit PDF
Convert PDF
Annotate PDF
Protect PDF
Fill and Sign PDF
Batch Process PDF
OCR
10 GB UPDF Cloud Storage
Free trial of UPDF AI:
AI summarize, analyse or translate 3 PDFs
Upload up to 100 pages per file to AI
Ask up to 30 questions
Powered by GPT-4
From From
Buy NowUnlock all features in UPDF(including AI) across Windows, macOS, iOS and Android, including:
Edit PDF
Convert PDF
Annotate PDF
Protect PDF
Fill and Sign PDF
Batch Process PDF
OCR
10 GB UPDF Cloud Storage
Full access to UPDF AI:
AI summarize, analyse or translate unlimited PDFs
Upload up to 1000 pages per file to AI
Ask questions or chat with AI
Get up to 100 GB extra cloud storage
Powered by GPT-4
AI benefits in one account can be shared across Windows, Mac, iOS, Android, and UPDF AI Web.
*The pricing and available features are based on the specific plans you decide on.