Getting Steam64 IDs

Often times you may need to get someone's Steam64 ID (eg. for adding a member to your faction). Although there are other ways, this simplest way is to use their profile.

Take for example this profile URL:

https://steamcommunity.com/id/asineth0

Append ?xml=1 at the end of the URL, like this:

https://steamcommunity.com/id/asineth0?xml=1

Upon opening the link, copy/paste the ID from the page like this:

The resulting ID should look like this:

76561198133841285