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  1. Home
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  3. Protect PDF

Protect PDF — Password Protect Your PDF Files

Need to protect PDF? Free tool to password protect PDF files. Add user and owner passwords, restrict printing, copying, and editing. Fast, secure, and 100% private — all in your browser.

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Select files to get started

🔒 No server upload • No watermark • Local processing in your browser
  • Secure & Private
  • Local Processing
  • Never stored
Rated by 50,000+ users
5M+ Images Processed100+ Countries100% Browser-Based
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Why Use Our PDF Protection Tool?

Dual Password Protection

Set separate passwords for opening the document and for permissions — user password to view, owner password to restrict actions

Granular Permissions

Control printing, copying, modifying, commenting, and more — with owner password

AES Encryption

Industry-standard AES 128-bit and 256-bit encryption to protect your PDF files

Metadata Encryption

Option to encrypt document metadata (title, author, subject, keywords)

Password Strength Checker

Real-time feedback on password security to ensure strong protection

Batch Protect

Protect multiple PDF files at once — coming soon

100% Private

Protect PDF completely in your browser. Your files and passwords never leave your device

Completely Free

No signup, no watermark, no limits — use our PDF protection tool as much as you need

How to Protect PDF — 3 Simple Steps

3 steps
01

1. Upload Your PDF File

Select the PDF file you want to password protect from your device.
02

2. Set Passwords & Permissions

Enter a user password (required to open) and optionally an owner password to set permissions.
03

3. Download Protected PDF

Click 'Protect PDF' and download your encrypted, password-protected PDF file.
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When You Need to Protect PDF

Confidential Documents
Protect sensitive business reports, financial statements, and legal documents
Client Deliverables
Password protect client reports to control who can view and edit
Employee Records
Secure HR documents with personal employee information
Intellectual Property
Protect proprietary information, research papers, and patents
Invoices & Contracts
Add password protection to invoices and contracts before emailing
Internal Communications
Restrict internal memos and policy documents to authorized personnel only

Why Use Our PDF Protection Tool?

Most online PDF protection tools upload your files to servers — security risk for sensitive documents. Our tool works entirely in your browser: faster, safer, and completely private. Protect PDF with AES encryption, dual passwords, and granular permissions.

100% Private

Your files and passwords never leave your device. Protect PDF safely

Dual Passwords

Separate passwords for opening (user) and permissions (owner)

Granular Permissions

Control printing, copying, modifying, commenting, and more

AES Encryption

Industry-standard 128-bit and 256-bit encryption

Metadata Encryption

Option to encrypt document metadata for extra privacy

Password Strength Checker

Real-time feedback to ensure strong passwords

No Installation

Works in your browser — no software to download

Free Forever

No signup, no watermark, no limits — completely free

Protect PDF — The Complete Guide to PDF Security

Need to protect PDF files? PDF documents often contain sensitive information — financial reports, legal contracts, employee records, or intellectual property. Adding password protection prevents unauthorized access and restricts printing, copying, or editing. Our free PDF protection tool lets you password protect PDF files with AES encryption, dual passwords (user and owner), and granular permissions — all 100% private, no server uploads.

User Password vs Owner Password

When you protect PDF, you can set two types of passwords: • User Password — Required to open/view the document • Owner Password — Controls permissions (printing, copying, editing) With only user password, users can view but not change permissions. Owner password adds an extra layer of control — perfect for documents you share but don't want modified.

PDF Permissions You Can Control

When you protect PDF with an owner password, you can restrict: • Printing — Allow high-res, low-res, or disable entirely • Copying — Prevent text and image copying • Modifying — Disable document editing • Commenting — Restrict comments and form filling • Screen readers — Allow for accessibility • Document assembly — Prevent inserting, deleting, or rotating pages Fine-tune exactly what users can and cannot do with your PDF.

AES Encryption for PDF Protection

Our PDF protection tool uses AES encryption: • AES 128-bit — Compatible with older PDF readers (Acrobat 7.0+) • AES 256-bit — Strongest security, requires newer PDF readers AES is the industry standard for encryption — used by governments and financial institutions worldwide.

Encrypting PDF Metadata

PDF metadata includes document title, author, subject, and keywords. Without metadata encryption, this information is visible even if the PDF is password protected. Enable metadata encryption when you protect PDF to hide this information from unauthorized users.

Private PDF Protection — No Server Uploads

Most online PDF protection tools upload your files to servers — your confidential documents and passwords end up on unknown servers. Our tool processes everything locally in your browser. When you protect PDF with us, your files and passwords never leave your device — safe for sensitive business documents and personal information.

Start Protecting: Secure Your PDF Files Today

Add password protection to your sensitive PDF documents. Use our free PDF protection tool — AES encryption, dual passwords, granular permissions, and 100% private. Perfect for financial reports, legal contracts, employee records, and client deliverables. 100% free, private, and no signup required.

Frequently Asked Questions About PDF Protection

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8
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