New ask Hacker News story: Ask HN: IDs that are URL-friendly and fairly short?

Ask HN: IDs that are URL-friendly and fairly short?
2 by tosh | 4 comments on Hacker News.
I am looking for a way (or best practices) on fairly short IDs that are also URL friendly. In a few past projects I've used UUID v4s with a custom encoding to shorten them down to 26 characters. But those IDs were still fairly long. I found this topic surprisingly difficult to google for. Any pointers or opinions very welcome.

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