Regex Testing Tools

Users recommend and discuss online tools like regex101.com, regexr.com, and rubular for testing, debugging, building, and understanding regular expressions.

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Keywords

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Sample Comments

XorNot Nov 26, 2014 View on HN

+1 regexr is my goto tool for regex's.

rtkwe Mar 7, 2025 View on HN

regex101.com is a lifesaver for parsing esoteric regexes after you've forgotten what they're supposed to do.

pseudo_meta Aug 8, 2024 View on HN

Use regex101, it's basically an "IDE" for regex.

jzombie Feb 10, 2023 View on HN

It's great for writing regex.

brettbender Oct 23, 2012 View on HN

Love rubular, use it every single time I write or edit a regex, just to test some weird cases while I think through the syntax.

shelf Jul 6, 2013 View on HN

regexr is another of these - better, arguably

dark-star Dec 12, 2022 View on HN

regexr.com is also a nice tool to play around with/understand regexes

tokenizerrr Aug 30, 2016 View on HN

RegexBuddy has a regex explainer, debugger, builder and tester. It works very well and supports exporting code to multiple languages and dialects

ferdbold May 24, 2016 View on HN

Regex101 is my go-to Regex testing tool. It's awesome.

dmingod666 Mar 31, 2021 View on HN

regex101.com is pretty comprehensive, my go to for complex regexes.. not sure if that's what you're complaining about..