When you're working on the go and need to lock a PDF on mobile, you need a solution that works on your phone or tablet. PDF Agile runs on Windows tablets and 2-in-1 devices, providing full desktop-grade PDF protection on mobile form factors.
PDF Agile is a Windows application that runs perfectly on:
- Microsoft Surface full PDF editing and locking with touch and pen support
- Windows 2-in-1 laptops flip to tablet mode and protect PDFs with touch controls
- Windows tablets compact, portable PDF locking on any Windows tablet
All features including encryption, copy protection, and redaction work seamlessly in tablet mode.
How to Lock a PDF on Your Windows Tablet
- Download PDF Agile on your Windows tablet or 2-in-1 (works in tablet mode)
- Open the PDF you need to protect supports touch and pen navigation
- Tap Protect Encrypt with Password
- Set an open password with encryption for maximum security
- Optionally add permission restrictions to disable copying and editing
- Save as a new locked copy the original stays unchanged
Mobile Locking Options Comparison
| Option | Encryption | Offline | Free |
|---|---|---|---|
| PDF Agile on Windows Tablet | ✔ Strong | ✔ | ✔ |
| Online mobile tools | Weak/none | ✘ Upload | ✔ |
| iOS/Android PDF apps | Varies | Varies | Freemium |
For robust, offline protection with encryption on a mobile form factor, a Windows tablet with PDF Agile is the most capable free option. Learn more about PDF locking →
Frequently Asked Questions
📱 iPhone/Android ？
PDF AgileWindows iOS/Android。Complete the steps to protect your document.
🖊️ ？
。PDF AgileLearn more.SurfaceWindows。
🔒 Is this secure?
PDF AgileWindowsAll operations run locally on your device.Secure，Complete the steps to protect your document.，Your files never leave your device.
Lock PDFs on Your Tablet Free & Offline
Full desktop protection on your mobile device. No cloud, no subscription.
⬇️ Free Download PDF Agile