Replying to Avatar daniele

It is all about the possibility of a collision. If you choose a shorten id, that I think is fine, you can however make it deterministic, ex. simply cutting a SHA-256 hash.

PS: check the birthday paradox.
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Jingles 2y ago

Of cause. Thus I chose 10 characters. Referencing YouTube video ID uses 11. And also based on how mission critical when collision happens, for a free URL shortener, it should be fine too.

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daniele 2y ago

I also think that 10 chars are ok. So why don't simply do an SHA-256 and cut it? :)