How to set the background to a project transparent?

I want to set my background to transparent. Would somebody tell me is it possible and if it is, how to implement it?
Link to my project:

  1. In Settings -> Rendering, check ‘Transparent Canvas’.
  2. Set the camera’s clear color alpha value to 0.

I have already done it but nothing’s changing. Is it a problem that I am embedding my project using iframe.

Please check out this thread:

My purpose is when I embedded it in my page i want to see only the object without anything else

Yes it’s exactly what i want. But after I did your guidance nothing changes. Now it’s with dark grey background.

I am embedding it, using iframe. Should I use other thing to embed it?

I did it thanks for the help guys.