PDF Security: Protect, Unlock, and Watermark Your Documents

The Privacy Problem with Online PDF Security

The Fundamental Contradiction

Most "online PDF security" tools require you to upload your document to their server. This creates a fundamental contradiction: you're trusting a third party with the very document you're trying to protect.

Our Zero-Server Solution

Our tools solve this by running entirely in your browser:

• Encryption happens in WebAssembly, in memory
• No server ever sees your document or your password
• The encrypted result downloads directly to your device

Protect PDF: Add Password Encryption

AES-256 Encryption

Our Protect PDF tool uses AES-256, the same encryption standard used by governments and banks worldwide.

Two Password Types

Permissions You Can Restrict

• Printing (none / low-res / high-res)
• Copying text and images
• Modifying the document
• Adding/editing annotations
• Filling form fields
• Content extraction for accessibility

Step-by-Step: Protect a PDF

1. Open Protect PDF
2. Upload your document
3. Set an open password (required to view)
4. Optionally set a permissions password and choose restrictions
5. Click Protect — encryption takes seconds
6. Download the secured PDF

Tip: Use a strong, unique password. Store it in a password manager. We cannot recover lost passwords—encryption is mathematically irreversible without the key.

Unlock PDF: Remove Password Restrictions

When You Need This

• You own a password-protected PDF but forgot the permissions password
• You received a document with unnecessary printing/copying restrictions
• You need to edit a PDF you have legitimate access to

Important: Legal & Ethical Use

Only unlock PDFs you own or have explicit permission to modify. Removing restrictions from documents you don't own may violate copyright or terms of service.

Step-by-Step: Unlock a PDF

1. Open Unlock PDF
2. Upload the protected PDF
3. Enter the open password (if required)
4. Click Unlock — restrictions are removed instantly
5. Download the unrestricted PDF

Note: If the document has an open password, you must provide it. We cannot bypass encryption without the key—this is a feature, not a limitation.

Watermark PDF: Brand & Protect

Text Watermarks

Add customizable text overlays:

• Content: "CONFIDENTIAL", "DRAFT", company name, or custom text
• Font: Size, color, opacity, rotation
• Position: Diagonal, horizontal, vertical, or custom coordinates
• Pages: All pages, first page only, or page range

Image Watermarks

Upload a logo or signature image:

• Transparency: Adjust opacity for subtle branding
• Scale: Fit to page or custom size
• Position: Nine preset positions or custom coordinates
• Tiling: Repeat across page for pattern effect

Step-by-Step: Add Watermark

1. Open Watermark PDF
2. Upload your document
3. Choose Text or Image watermark
4. Configure appearance and position
5. Select page range
6. Click Watermark — processing is instant
7. Download the watermarked PDF

Security Workflow: Complete Document Protection

For maximum security, combine tools:

{`Original PDF
    │
    ├─→ [Protect PDF] ──→ Encrypted PDF (AES-256)
    │                        │
    │                        ├─→ [Watermark PDF] ──→ Branded, encrypted PDF
    │                        │
    │                        └─→ Share securely
    │
    └─→ [Unlock PDF] (if you own it) ──→ Remove restrictions for editing`}

Why Browser-Based Security Matters

Compliance & Regulated Industries

Our zero-server architecture is uniquely suited for:

• Healthcare (HIPAA): No PHI leaves the device
• Legal (Privilege): No third-party access to privileged docs
• Finance (SOX, PCI): No financial data on external servers
• Government (FedRAMP): No cloud dependency for processing

Try the Security Tools

• 🔒 Protect PDF — Add AES-256 encryption
• 🔓 Unlock PDF — Remove permissions restrictions
• 🏷️ Watermark PDF — Add text or image watermarks

All free. All private. All in your browser.