I love using Crockford's Base32 to encode "invite codes" or any ID that you may want to share/write down/spell out: don't have to worry about mixing up O-s and

I love using Crockford's Base32 to encode "invite codes" or any ID that you may want to share/write down/spell out: don't have to worry about mixing up O-s and zeroes - or care about casing. I try to make it obvious in UI by automatically converting to uppercase, replacing O->0 etc, and adding a dash in the middle.