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Build regex online for free. Create regular expressions visually. No regex knowledge required.
Build regex patterns without syntax errors
//Build pattern piece by piece
Configure regex options (g, i, m)
Enter test string to validate
Use in JavaScript, Python, etc.
Build pattern piece by piece
Configure regex options (g, i, m)
Enter test string to validate
Use in JavaScript, Python, etc.
Regular expressions are patterns used to match character combinations in strings. Essential for validation and text processing.
g=global (all matches), i=case-insensitive, m=multiline (^ and $ match line breaks).
Test one string at a time. For batch testing, copy the regex and use a regex tester tool.
Combine components: word chars + @ + word chars + . + word chars, or use standard email regex patterns.