Add password protection and encryption to your PDF documents instantly. Free, secure, and works offline with military-grade security.
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Unlimited files
Protect as many PDFs as you need
Preserves quality
No compression or quality loss
Lightning fast
Protect large files in seconds
100% secure
Files processed locally on your device
A complete suite of PDF tools designed to make every document task simple.
Edit text, images and annotations
Combine multiple PDFs into one
Reduce file size without quality loss
Convert PDF to Word, Excel, images etc.
Add passwords and security
Digitally sign PDF documents
Translate documents into different languages
Generate AI-powered document summaries
The most trusted PDF security solution with military-grade encryption and complete privacy protection.
Protect thesis papers, research documents, and academic work from unauthorized access. Secure your intellectual property and maintain academic integrity.
Secure confidential contracts, financial reports, and sensitive business documents. Ensure compliance with data protection regulations and client confidentiality.
Protect proprietary information, employee records, and corporate documents. Implement document-level security policies and access controls.
Common questions about protecting PDF files with PDFly.
Free, unlimited PDF protection with military-grade encryption and complete privacy.