Crop out white part of image?

[ultranerds]

Yeah - PNG's caused me no end of headaches with the sheer size of them

If your site needs the white padding, why are you trying to remove it?

I add the white bit. But I also want to create a version of the image, which can be shared. Basically a "not squared" version. There are some places (such as social media) when people share, the image really doesn't need any padding - it just needs to be the correct size (otherwise you end up with awkward empty space etc)

[snibgo]

I notice that you have posted a png image that has clearly been through jpeg compression. It is generally best to use jpg as a final output step only. Never use it as in a format for intermediate stages.