UPDF
UPDF for Windows
UPDF for Mac
UPDF for iPhone/iPad
UPDF for Android
UPDF AI Online
UPDF Sign
Edit PDF
Annotate PDF
Create PDF
PDF Form
Edit links
Convert PDF
OCR
PDF to Word
PDF to Image
PDF to Excel
Organize PDF
Merge PDF
Split PDF
Crop PDF
Rotate PDF
Protect PDF
Sign PDF
Redact PDF
Sanitize PDF
Remove Security
Read PDF
UPDF Cloud
Compress PDF
Print PDF
Batch Process
About UPDF AI
UPDF AI Solutions
AI User Guide
FAQ about UPDF AI
Summarize PDF
Translate PDF
Chat with PDF
Chat with AI
Chat with image
PDF to Mind Map
Explain PDF
PDF AI Tools
Image AI Tools
AI Chat Tools
AI Writing Tools
AI Study Tools
AI Working Tools
Other AI Tools
AI Bookmark Generation
AI Bookmark Summary
AI Watermark Generation
AI Background Generation
AI Sticker Generation
AI Stamp Generation
AI Editing Suite
UPDF Copilot
AI Page Management
AI Semantic Search
PDF to Word
PDF to Excel
PDF to PowerPoint
Enterprise Solution
Enterprise Sign
Enterprise AI
Enterprise Plan
Enterprise User Guide
Enterprise Webinar
Banking
Healthcare
Insurance
Legal
Manufacturing
Government
Education Solution
Customer Stories
User Guide
UPDF Tricks
FAQs
UPDF Reviews
Download Center
Blog
Newsroom
Tech Spec
Updates
UPDF vs. Adobe Acrobat
UPDF vs. Foxit
UPDF vs. PDF Expert
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
-
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
-
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 Now
Keep 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.
-
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
-
8 Tiled Options
Adjust tile spacing and angle as needed
-
∞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:
