PDF Tool
Protect PDF
Password protect PDF documents online. Lock PDF files and encrypt PDF online with custom passwords directly in your browser with zero server uploads.
Zero server uploads
Pure client-side processing
Immediate in-memory export
Drop files here, or click to browse
PDF, DOCX, XLSX, PPTX, JPG, PNG, MP3, MP4, EPUB, ZIP and 100+ more
How to Use Protect PDF in 3 Simple Steps
1
Add Input Files
Drag or drop your supported files directly into the active workstation above.
2
Configure Parameters
Adjust settings, preview alterations in real time, or customize options.
3
Save & Download
Export completed files directly to your device with zero cloud latency.
Frequently Asked Questions
Enter your chosen password to lock PDF contents with standard document encryption and prevent unauthorized opening.