Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<body>

<form action="demo_form.asp">
  Select a file: <input type="file" name="img">
  <input type="submit">
</form>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.