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Chat with Any PDF. Get Instant Summaries and Answers with AI Assistant Online. Use It Now

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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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:

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

Free Download
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