Free AI developer utility
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Regex Generator
Writing regular expressions is notoriously painful. Type what you want to match (e.g., UUID v4 format or HTML tag attributes) in plain English. Our engine compiles an optimized regex pattern, provides explanations, and generates test suites instantly.
Describe your text-matching rules in your own words.
Compile Your Expression
State your parsing goals on the left and tap "Generate Regular Expression" to automatically draft your optimal regex structure.
Compiling Expression...
Parsing anchors, mapping character boundaries, and preparing visual sample tests.
Regular Expression Pattern
/^([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]5)$/g
How It Works
Validation Matches (Should Pass)
Validation Failures (Should Fail)
Language Integration Snippet
Run Secure AI on local files
Unrestricted workspace contexts, offline model operations.