You can only protect a file at a time and the size must be less than 10MB.
For your information security, file uploading is protected by SSL and we will not keep the file.

Invalid file format. Please select another file.

Unable to upload multiple files. Conversion is limited to one file at a time. Please select a file.。

You cannot protect a file that is over 10MB. Please select another file.

Sorry! Conversion failed because there is something wrong with the file.

Try Gaaiho PDF Suite now to convert files of any size for 30-day free!

Conversion in progress..

Uploading.. (KB) / KB

Upload failed

Choose Gaaiho PDF Suite for unlimited conversion. Try now

Free download

Encryption complete

You'll need the password to open this PDF later. Keep it in your mind.