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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

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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.

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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

  • Mark for Redaction

  • Redact Pages

  • Find Text & Redact

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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

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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

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Tips and Tricks for How to Protect PDF Files Explore More

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How to Password Protect PDF Using 10 Easy Methods
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How to Password Protect PDF Without Acrobat?
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What Is Redact PDF and How to Redact PDF
PDF redaction tools

The Top 5 PDF Redaction Tools and How to Use Them
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What is a PDF Password and How to Add a Password

Other Features of UPDF

UPDF is an all-in-one PDF solution - here are some other great features:

UPDF AI

AI AssistantHOT

Summarize, translate, and chat with PDF.
edit pdf

Edit PDF

index functions edit image desc
read pdf

Read PDF

Immerse in seamless PDF reading.
annotate pdf

Annotate PDF

Enhance PDF collaboration with annotation.
convert pdf

Convert PDF

Transform PDF to/from diverse formats.

Ocr pdf

OCR PDF

Make scanned PDFs searchable and editable.
Compress pdf

Compress PDF

Reduce PDF file size to perfection.
organize pdf

Organize PDF

Simplify PDF page organization.
Batch pdf

Batch PDF

Batch convert, combine, insert, encrypt and more.
Cloud pdf

Fill and Sign

Seamlessly create, fill, and sign PDF forms.

Protect Your PDFs with UPDF Now

macOS

Supports macOS 10.14.6 or later Download from Mac App Store

Free Download

Windows

Supports Windows 7 or later

Free Download

iOS

Supports iOS 14.0 or later

Free Download

Android

Supports Android 6.0 or later Download UPDF APK for Android

Free Download
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