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..