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I'm not aware of any tools out of the box, but you could trivially build your example regex from a Trie which is also easy to construct.

https://en.wikipedia.org/wiki/Trie#Algorithms

I'm not so sure it would take up much less space though, if you take gzip compression into account. See for example here:

https://github.com/google/closure-compiler/wiki/FAQ#closure-...

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Something like that would probably be better off with Aho-Corasick, with is similar to a trie but ends up with more compact FSMs

Hmm I've never heard of tries before but that looks pretty close to what I'm looking for.

As for the size aspect, it might not make much of a difference in the gzipped filesize but there are other benefits to smaller raw source as well (but honestly I don't have any idea if it would be at all worth anything, I'm assuming no).

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