Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <body> <form action="demo_form.asp"> Select images: <input type="file" name="img" multiple> <input type="submit"> </form> <p>Try selecting more than one file when browsing for files.</p> <p><strong>Note:</strong> The multiple attribute of the input tag is not supported in Internet Explorer 9 and earlier versions.</p> </body> </html>
Result:
W3Schools.com - Try it yourself