PDF Key
Password Lock for PDFs
Only for iPhone
Free
iPhone
Protect PDFs with a password in a simple, private, on-device workflow. No accounts, uploads, ads, or tracking.
PDF Key is a simple app for adding an open password to PDF files.
Choose a PDF, enter a new password, and save it as a password-protected PDF.
If the selected PDF is already password-protected, you can unlock it with the current password first. Leave the new password blank to export a PDF without a password.
PDF Key does not include editing, merging, splitting, OCR, scanning, cloud sync, or password recovery features. It is focused on one job: protecting PDFs with a password.
Features:
・Add an open password to PDFs
・Open password-protected PDFs
・Export without a password by leaving the new password blank
・Save as a new file without overwriting the original
・On-device processing
・No account
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Added a “Share PDF” button so you can send your exported PDF directly from the iOS share menu. It is now easier to share PDFs by email, messages, or other apps after processing.
The developer, Riku Kanai, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Riku Kanai
- Size
- 5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Happitopia