Protect PDF Online — Free, Fast & Secure
Secure your PDF files with strong password encryption. Set permissions to control printing, editing, and copying. Our protect pdf tool works entirely in your browser — no software installation required. Your files are encrypted with 256-bit SSL and automatically deleted after processing. No signup or account needed.
Whether you're on Windows, Mac, Linux, iPhone, or Android — our protect pdf tool works perfectly on any device with a web browser. Process .PDF files up to 100 MB for free, or upgrade to Premium for files up to 4 GB with batch processing.
Why use our protect pdf tool?
- ✓Password encryption
- ✓Permission controls
- ✓Restrict printing & copying
- ✓Strong AES encryption
- ✓100% free — no registration required
- ✓Works on all devices and browsers
- ✓Files are encrypted and auto-deleted for your privacy
Frequently Asked Questions
Is protect pdf free?
Yes! Our protect pdf tool is completely free for files up to 100 MB with up to 2 files per task. No signup, no credit card, no hidden fees.
Is it safe to protect pdf online?
Absolutely. All files are transferred over encrypted HTTPS connections. We process your files securely and automatically delete them within 2 hours. Your documents are never shared or accessed by anyone.
What is the maximum file size?
Free users can process files up to 100 MB. Premium users enjoy increased limits up to 4 GB per file, plus batch processing for up to 80 files at once.
Does it work on mobile devices?
Yes, our protect pdf tool is fully responsive and works on smartphones, tablets, laptops, and desktops. No app download required — just open your browser and start processing.