You aren't supposed to store the hyphens, and that's the same for all versions.

What if I want an ID in the URL? Parse it back and forth? And what if for example, nodejs's UUID api only gives me the string representation of the ID?

	▲	matja 9 minutes ago \| parent [-]
		To minimize the storage space while having a URL-safe representation, yeah you'd want to serialise/deserialise on the boundary of presenting it to API consumers. I think the same for any ID that has an efficient binary representation as well as needing to represent it in ASCII.