Ask HN: Tools for working with Vim regex?

I have been trying to convert fairly complex-for-me PCRE/JavaScript style regular expressions[1] to be Vim-compatible. I have not been able to find any tool that will automatically convert to and from Vim regex. Is there one I have missed? In addition, the main Regex testing apps I use (regexr.com and regex101.com) don't support Vim regex, which makes figuring out what's wrong more tedious. The closest I have gotten is by asking Phind to do it (https://www.phind.com/search?cache=43967e8e-ec1c-4e9a-94ab-5049857e330f), but it does not produce a working result on its own. The only real resource I've found is https://vimregex.com/. Is there any automated tool that could help with this task? Thanks! [1]: This common-OCR-error-correcting regex is one of them: (?<!\b[A-Z][a-z]{3}|th|whil|i)(?:e|s)((?:\s|(?:\n){2})(?:"|*)?[A-Z]) (Edit: HN is removing some of the escape characters. See: https://gist.githubusercontent.com/curiositry/dad4379d7c6de3e5969e367f0a69aa4e/raw/49521de5694c3e839a63ca482574e0654c909ec6/regex.txt)