How it works?

After installing UnlockPDF, the first thing you need to do is to allow required permissions. Don't worry, only file reading and writing is the required permission. We want PDF documents to be loaded by the app, so if you have an app that is set as a default PDF viewer then you have to clear that one.

Upon opening a PDF document, you would notice that UnlockPDF is available as an option. Select UnlockPDF but don't set it as the default app for opening all your PDF docs. UnlockPDF will try to unlock the PDF with passwords it remember otherwise it will ask you to enter the the password. After a successful unlock, UnlockPDF will tell Android to open the unlocked document and you will be prompted to choose a PDF viewer application. Choose a PDF viewer application this time.

You can clear saved passwords in the app.

Snapshots.

Right, we don't want to hear you complaining about how bad and plain the user interface was done. We didn't care and had much time planning how good looking it is, but we cared more about how easy and useful it is. If you think you can do better, we have the source code open and free for use and modification. Just don't forget to link back to the original work.

Creative Commons License.

Creative Commons License
UnlockPDF by it2051229 is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Based on a work at https://github.com/it2051229/UnlockPDF.

Acknowledgement

This is a non-profit project organized, developed, and maintained by...

it2051229 Developer
iText PDF API Library