Protect PDF
True PDF encryption with password protection is not available in the free browser-only version due to technical limitations. Real PDF encryption requires server-side processing or commercial libraries. This feature is coming in a future update with server-side support.
🚀 Coming Soon
Our high-fidelity Protect PDF engine is in final testing. Sign up for the waitlist on our contact page and we will notify you the moment it goes live.
Drop file or click to upload
True PDF encryption with password protection is not available in the free browser-only version due to technical limitations. Real PDF encryption requires server-side processing or commercial libraries. This feature is coming in a future update with server-side support.
Single file upload • 100% private • Processed in your browser
NEXT_PUBLIC_ADSENSE_CLIENT_ID to activateAbout this Protect PDF tool
True PDF encryption with password protection is not available in the free browser-only version due to technical limitations. Real PDF encryption requires server-side processing or commercial libraries. This feature is coming in a future update with server-side support. Our protect pdf engine runs entirely inside your browser using WebAssembly, which means you get instant results and bulletproof privacy — your files never touch a remote server.
How to use Protect PDF
- Click the upload area above or drag and drop your file.
- Adjust any options (rotation, pages, watermark text, etc.).
- Hit the Protect PDF button.
- Your processed file downloads automatically.
Why use PDFMaster Pro?
- 100% Private — files stay on your device.
- Lightning fast — no upload, no waiting.
- Free forever — no signup, no watermarks, no limits.
- Works everywhere — Mac, Windows, iOS, Android, Linux.