Regex Tester & AI Rule Explainer
POPULARBuild, test, and debug regular expressions with live match highlighting and AI explanations.
4.9
rating
270K users
Instant
Interactive Regular Expression workbench featuring real-time regex highlighting, match group inspection, cheat sheets, and AI explanation of complex regex patterns.
How to use
- 1 Enter your Regular Expression pattern and select flags (g, i, m, s).
- 2 Type or paste test string content in the sample input field.
- 3 Watch matched tokens and capture groups highlight live.
- 4 Click Explain Regex to read human breakdown of what the pattern matches.
Features
- Real-time token syntax highlighting.
- Detailed list of capture groups and index offsets.
- Common regex pattern presets (Email, URL, IP Address, Phone, Date).
Benefits
- Avoid regex errors in production code.
- Understand complex regular expression syntax effortlessly.
Frequently asked questions
Which regex dialect does it use?
Uses standard JavaScript ES2024 Regex engine supporting lookbehinds and named capture groups.
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