🔍 Regex Tester
Test regular expressions with real-time match highlighting, match count, and captured groups. Supports global, case-insensitive, and multiline flags.
Regular Expression Tester
This tool lets you test and debug regular expressions against any text input. Matches are highlighted in real time, and all captured groups are listed below. You can toggle flags for global, case-insensitive, and multiline matching.
Common Patterns
- Email:
\b[\w.-]+@[\w.-]+\.\w+\b - URL:
https?://[\w\-._~:/?#\[\]@!$&'()*+,;=]+ - Phone (US):
\(\d{3}\)\s?\d{3}-\d{4} - Date (YYYY-MM-DD):
\d{4}-\d{2}-\d{2}
Frequently Asked Questions
What is a regular expression?
A regular expression (regex) is a sequence of characters that defines a search pattern. It is used in programming for string matching, validation, search-and-replace, and data extraction. Common use cases include email validation, URL parsing, and log analysis.
What are common regex patterns?
Common patterns include: email validation, phone number formats, URL matching, date/time formats, and IP addresses. Each pattern uses special characters like . * + ? ^ $ [] and () to define matching rules.
Why should I test my regex?
Testing regex helps you verify it matches the intended patterns without false positives or missed matches. This tool provides instant visual feedback with highlighting and shows all captured groups, making it easy to debug complex patterns.
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