How to restrict file extensions in document library

sharepoint.stackexchange https://sharepoint.stackexchange.com/questions/288811

Question

I'm using SharePointOnline's Modern UI.

I would like to display an error message if a user uploads anything other than a PDF file in the document library.
Is there any way to achieve this other than an event receiver?

I would appreciate any ideas or pointers.

Was it helpful?

Solution

For now, there is no OOB approach to block certain file types in a library, Here is a User Voice where you can vote for adding this feature.

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