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I have a study app that provides PDFs but these PDFs only open in the app itself even after downloading, like YouTube offline videos, I looked up for these saved files in the app data folder, but they have no extension. I tried different extensions so that I could open them, but they aren't opening. Please help if you know how to open, I'm attaching a file via a Google Drive link.

Robo
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Guru Sandhu
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1 Answers1

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In some systems file extensions may not be visible.

For a viewer to open a PDF, ideally it should have a file extension as .pdf.

Likewise if the file is badly defined or broken the PDF may not start with %PDF-1.7 or similar in the first line.

If a file is broken in transit parts may have become garbled and that seems to be what's happened to your personal copy of now broken pdf. enter image description here

You need to repair the corruption by overwrite and save as repaired.pdf enter image description here

enter image description here

K J
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