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iHateRegex

Understand, test, and share regex

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iHateRegex is a web-based tool for understanding, testing, and sharing regular expressions. It provides a playground where you can type a regex pattern and test it against sample text with live matching. The tool automatically generates browser-rendered railroad diagrams to visualize the pattern's structure. You can add notes beside each pattern to explain why it works, and share the entire workspace with your team via a single link. The site also includes a library of 29 practical regex patterns for common use cases such as email, phone numbers, URLs, passwords, and more.

7 alternatives to iHateRegex

Ranked by how well each tool replaces iHateRegex: shared features, audience, price and popularity.

  1. RegexPal

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  5. RegexBuddy

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  6. Regex Hero

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