Protect PDF — FAQ
Is Protect PDF free?
Yes, completely free. No account, no watermark, no daily limits.
Are my files safe?
Files are processed 100% in your browser using JavaScript. They never reach any server. Verifiable in DevTools → Network tab.
What is the file size limit?
Up to 50MB per file. Very large files may take a few seconds on slower devices.
Does it work on mobile?
Yes — iPhone, Android, any browser. No app needed.