input accept excel html
Add accept attribute to the input :
accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"
<input type="file" name="file" id="file" class="form-control" required accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel">
Other input types :
CSV files (.csv): accept=".csv"
Excel Files 97-2003 (.xls): accept="application/vnd.ms-excel"
Excel Files 2007+ (.xlsx): accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
Text Files (.txt): accept="text/plain"
Image Files (.png/.jpg/etc): accept="image/*"
HTML Files (.htm,.html): accept="text/html"
Video Files (.avi, .mpg, .mpeg, .mp4): accept="video/*"
Audio Files (.mp3, .wav, etc): accept="audio/*"
PDF Files: accept=".pdf"