Private browser tool
Protect PDF
Encrypt a PDF locally with an AES-256 password before sharing it.
Open Protect PDFWhat this tool accepts
.PDF input · .PDF output
Local safeguards
1 PDF file · 75 MB. 500 pages/file · 1,024 characters max in new password · 128 MB max result
Private and offline-capable
Processing happens in this browser. Files are not uploaded, and generated results remain in memory until downloaded or the tab is closed. After the first successful production load, the app shell and local processing engines can work offline.