Regex Tester & AI Builder
Test regex patterns with live matching. Describe what you need in plain English and AI builds the regex.
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What is Regex Tester & AI Builder?
A powerful regular expression tester with real-time matching, group highlighting, and an AI-powered builder. Describe what you want to match in plain English and get a working regex instantly. Includes cheat sheet and common patterns.
AllKit's Regex Tester & AI Builder is completely free with no signup required. Powered by state-of-the-art AI models, it delivers professional-quality results in seconds.
Why use AllKit?
- No ads, no distractions — a clean interface that lets you focus on the task
- Privacy-first — minimal data processing, results delivered instantly
- Free forever — core tools are free with no usage limits
- API available — integrate into your workflow via our REST API
Frequently Asked Questions
What are regular expressions?▾
Regular expressions (regex) are patterns used to match character combinations in strings. They're essential for validation, search-and-replace, and data extraction in programming.
How does the AI regex builder work?▾
Describe what you want to match in plain English — like 'email addresses' or 'dates in MM/DD/YYYY format' — and AI generates a tested regex pattern with an explanation of each part.
Which regex flavors are supported?▾
The tester uses JavaScript's built-in regex engine, which supports most common features including lookahead, lookbehind, named groups, and Unicode properties.
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