PDF Secure Pro

Protect PDF Secure Pro makes locking your PDFs fast, private, and reliable — all encryption happens on your device.

Select a file, set a password (or generate a strong one), protect, and share. That’s it.

Key features:

On-device security: Protect PDFs locally; nothing leaves your device.
Strong passwords: One-tap generator with strength meter and history.
Simple workflow: Select PDF from Files, set password, protect, share.
Clean UI: Optimized for iPhone and now beautifully centered on iPad.
Privacy-first: No accounts, no analytics, no subscriptions.
Pro (one-time purchase):

Unlimited protections and password generations.
Lifetime unlock — no recurring fees.
How it works:

Open the app → Protect tab → Select PDF.
Enter or generate a password → Protect PDF → Share the new protected file.
Notes:

Works with PDFs from the Files app, iCloud Drive, and third‑party providers integrated with Files.
Passwords and processing remain on your device.