Protect PDF
Encrypt your PDF documents with a strong password. Completely secure client-side encryption.
Choose PDF file to protect
Drag and drop file here, or click to browse
File Ready!
Processed entirely in your browser. Nothing was uploaded. Your file is ready to download.
About Protect PDF
Add password protection and encryption to your PDF files. Secure sensitive documents before sharing.
Key Highlights
- AES-256 encryption for maximum security
- Set user and owner passwords
- Restrict printing and editing
- No server-side processing
- Passwords never leave your device
How to Use Protect PDF
- Select or drag & drop your file into the Protect PDF workspace area.
- Configure your desired options or processing parameters if needed.
- Click the primary action button to process your file instantly inside your browser.
- Download your processed file immediately with zero server latency.
Technical Specifications
| Supported Inputs | PDF (.pdf) |
|---|---|
| File Size Limit | No server cap (dependent on browser memory) |
| Processing Engine | Client-Side JavaScript & WebAssembly |
| Data Privacy | 100% In-Browser Execution — Zero Uploads |
| Compatibility | All Modern Desktop & Mobile Browsers |
Frequently Asked Questions
Yes, Protect PDF on FileForge is 100% free with no subscriptions, account registrations, or hidden fees.
No. FileForge processes all files locally inside your browser tab using WebAssembly and HTML5 File APIs. Your documents never leave your device.
Yes, Protect PDF is fully responsive and optimized for smartphones and tablets across iOS and Android browsers.
There are zero usage restrictions or daily limits. You can process as many files as you need without throttling.