Restrict File Upload Formats

Would be nice if you could restrict File field uploads to specific file formats or file extensions, ie: “.pdf” or “.jpg”

Is there anyway to do this?


I have not tested but as it is a free field and not a drop-down I would assume you could add multiple with a comma otherwise I would prefer a drop-down with extensions to choose one by one.



This is great! But is there a way to specify two specific file types only to accept? If I add two validation rules they seem to cancel one another out, screenshot attached. Thanks.



Knack HQ - Any news on this? Would really help my business workflow.