Hi Uppy Team 
,
Thanks for the amazing work on Uppy — it’s a truly developer-friendly and robust upload solution!
I have a small but impactful feature suggestion specifically related to file type validation:
Please consider including the file name in the error message when a file is rejected due to an unsupported file type.
Context
When users upload multiple files and some of them fail the allowedFileTypes check, the resulting error message doesn’t indicate which file(s) were rejected. This creates confusion for users, especially when dealing with a batch of uploads.
Example
Instead of: You can only upload: .png, .jpg
we could say: document.exe’ is not supported. You can only upload: .png, .jpg
Benefit
This would make it much easier for users to identify and correct problematic files during bulk uploads.
Would love to know if this is something that could be supported in a future release — or if there’s a known workaround for customizing those specific error messages.
Thanks again for your great work on Uppy!
Best regards,
Benjamin.