Protect PDF Files Online FREE - Add Passwords, Encryption & Security to PDF Documents | DonePDF — PDF Converter, Editor & Online Tools

protect pdf

Protect PDF

Protect sensitive PDFs with powerful encryption

Permission Control

Control editing permissions easily

Disable editing for unauthorized users
Block printing options
Restrict copying and extraction
Fine-tuned permission settings

Format Compatibility

Works seamlessly with all PDF formats

Supports scanned and digital PDFs
Retains formatting during encryption
Compatible with PDF/A and modern standards
No data loss during encryption

Efficient Encryption Performance

Enhance security without affecting file size significantly

Minimal impact on file size
Optimized encryption performance
Suitable for large documents
Maintains document quality

Strong Security

Advanced protection against unauthorized access

Strong encryption algorithms
Resistant to password cracking
Unbreakable AES-256 security
Protection suitable for legal & corporate use

Unlock PDF

Remove protection from PDF files securely

Unlock encrypted PDFs
Retain original formatting
Fast unlocking process
Works on all devices

Cross-Platform Compatibility

Works on Windows, macOS, Linux, iOS, and Android

Compatible with Windows, macOS, Linux, iOS, and Android
Supports all modern browsers
No installation required
Optimized for mobile and desktop

Privacy First

Your files never leave your device — full privacy guaranteed

100% local processing
No file uploads to servers
Automatic deletion after processing
No tracking or data storage