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There are KSUIDs that aim to satisfy this
A go ref impl: https://github.com/segmentio/ksuid
I really like https://github.com/ai/nanoid which is available for a wide range of programming languages. It creates short, random, and URL-safe IDs.
These days ULID (https://github.com/ulid/spec, or any of the variants), or most recently the new UUID versions (https://www.ietf.org/archive/id/draft-peabody-dispatch-new-u...) give you creation-order sorting.
> The dash-separated hexadecimal format takes 36 characters to represent 16 bytes of data.
You can use a different formatting. I would suggest looking at https://github.com/oculus42/short-uuid Of course if you just want a random ID, then you might not need a UUID. But UUIDs have the advantage that there are different versions and you can distinguish them; e.g. you might want a unique ID that gives you some debugging information (where/when was it created), so you use v1 and later you can decide to switch to v4 if decide you want the IDs to carry no information.
Indepedent of how you generate the ID, I think the base-57 encoding that shortUUIDs use is quite good when the IDs are user facing. Not using O,0,l,1,I in the alphabet makes IDs more readable.