I am using a variant of SnowflakeId [^1] in order to have 64 bit keys too.

It's similar to UUIDv7 (it leaks the creation time), but it's not an issue for me.

So I am able to have a single 64 bit key, which can easily be formatted into a small string for user-facing urls.

[^1]: https://instagram-engineering.com/sharding-ids-at-instagram-...