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Regex Helper is a tool for testing, learning, and experimenting with regular expressions in real time. It lets you validate regex patterns, find matches in sample text, and visualize matches, with features like a pattern builder, saved patterns, and a test text area including examples (email, phone, URL). It also provides options for common regex flags, find-and-replace functionality, and a link to MDN for further learning.
AI named RegEx Helper from February 2026 to March 2026.