Add password protection and encryption to your PDF files. Set open passwords and restrict printing, copying, or editing. No upload — your files stay 100% private.
Select PDF to protect
100% Local • Max: 100MB • Instant
Your PDF is now password protected
Click the upload button or drag and drop your files into the tool.
Configure your options or arrange files if needed.
Click the process button and download your processed file instantly.
Upload your PDF, set a password, choose protection options (restrict printing, editing, copying), then download the locked PDF. All encryption happens in your browser.
Yes! OnlinePDFPro uses industry-standard AES encryption. Plus, since your PDF never leaves your device, the encryption is even more secure than cloud-based tools.
Yes! You can set an 'open password' to prevent unauthorized access and an 'owner password' to restrict editing, printing, and copying.
Yes! OnlinePDFPro works perfectly on all devices - Android phones, iPhones, tablets, laptops and desktops. No app download needed.
Since processing happens in your browser, there's no server-side file size limit. You can process files as large as your device can handle.
