[Midnight]

This is fairly easy as you don't even need PS:

H

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[Bird]

I assume that this is helpful for those without Photoshop, so thank you for the share.

[Oxyrus]

And with css

.your-gorgeous-image{
border-radius: 50%;
}

[Midnight]

And with css

.your-gorgeous-image{
border-radius: 50%;
}

Yep c:
This is cool when coding ^_^

[Nuke]

Thanks for share dude!

[Chroma]

Thanks for sharing, will check it out for sure

[Kill]

And with css

.your-gorgeous-image{
border-radius: 50%;
}

No, You need to preset width and height to be equal.

[Fusion]

Thanks for the share! Pretty awesome!

[CIA]

thanks but i dont need this bruh!

[Kotomi]

Easier:
Use eclipse tool
Hold shift
Ctrl c
Delete background
Ctrl v