Skin URL
Confirm a valid skin
Make sure the URL points to only the valid skin PNG file.
If you are using imgur, make sure that the url ends with .png.
A valid skin url should look like this: https://i.imgur.com/QuoWt6B.png (opens in a new tab)
You can see the image below as reference:
Uploading to imgur
This time we are going to upload your custom skin format to imgur. Follow the following steps:
Download the file
Go to https://imgur.com/upload (opens in a new tab)
Upload the file to imgur (see image below)
Getting the url
The Skin URL MUST END WITH .PNG, so make sure that you have the right url!
Below you can see the skin I just uploaded to imgur, now right-click on the image and hit "Copy image url"
It should copy an url like https://i.imgur.com/abcdefgh.png
That's it! you can now set the skin by using your IMGUR url!