All tools
PRIVACY / FREE TOOL
Protect PDF
Add AES-256 password protection.
On this deviceDrop your files here
Or choose files. Up to 100 MB per file.
0 imported files
How to use this tool
- Choose a strong opening password and optional permissions password.
- Download the protected PDF and keep the password separately. Readers enforce printing/copying restrictions differently.
Where are my files processed?
The badge shows the selected processing location. Local jobs stay on this device. Cloud jobs require the cloud option and use temporary storage.
How do I save the result?
When the tool finishes, preview the result and use Download. Your original files stay unchanged. Use ZIP to save a batch together.
How do I clear my workspace?
Use Privacy & local data in the sidebar. AI keys can be forgotten separately from AI settings.