Regex Tester
Test regular expressions with real-time matching and highlighting.
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What are regular expressions?
Regular expressions (regex) are patterns used to match character combinations in strings. They are a powerful tool for searching, replacing, and validating text in programming languages, text editors, and command-line tools.
How to use this tool
Enter your regex pattern in the pattern field and your test string in the text area below. Matches are highlighted in real-time as you type. You can add flags like 'g' for global matching, 'i' for case-insensitive, and 'm' for multiline mode.
Common use cases
Validating email addresses, phone numbers, and other input formats, searching and replacing text patterns in code editors, parsing log files and extracting specific data, and building input validation for web forms.