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Protect PDF
Add password protection to your PDF
Drop your PDF here
or click to browse
Free to start
Works offline
No upload required
Add password protection to your PDF
Drop your PDF here
or click to browse
Choose a PDF from your device
Choose a strong password
Save your finished PDF
Your files never leave your device. No uploads, no servers, no tracking.
No upload wait times. Processing starts instantly on your device.
Everything processes locally. Your files never touch our servers.
ModernPDF uses PDF encryption. Your password protects the file from being opened. All encryption happens locally.
Currently a single password is set required to open the PDF.
No. Encryption wraps existing content without modifying it.