It's for personal use

Yeah, that's my intended result

I would like to make the pitch go down as the music is slowed down as well.

Thanks so much! I'll keep looking.

Yeah, I've been using Audacity to do that exact thing but I'm looking for a website which does the same thing, as I like working on iPads and there isn't Audacity web.

Yeah, in a sense I do. I really like the effect that slowed down music gets but I can't find any websites which do that anymore

It's alright. Let me re-phrase.
I want to slow down an MP3 from my downloads folder, and slow it down so the pitch is effected as well, generating a lower pitch effect. It's like with slow-mo videos, where voices sound very deep and the video is slowed down. I want to do something similar. I want to slow down music so the pitch falls. Most websites just stretch out the music, therefore not changing the pitch.

No I didn't, my post said that i want to affect tempo (speed) and pitch.

Thank you

No I didn't, I said "do you have any websites that slow down audio affecting the pitch and the speed"

I like the sound of slowed down, pitched down music. That's what I mean, Sorry if it's unclear.

I said slowing something down affecting it's speed and it's tempo.