Regex Tester
Test regular expression patterns with real-time match highlighting. Supports all regex flags and displays capture groups clearly.
Global - find all matches
Enter a pattern and test string to see matches
How to Use
- 1
Enter your regex pattern
Type your regular expression in the pattern field. Use standard JavaScript regex syntax.
- 2
Configure flags
Toggle flags like global (g), case-insensitive (i), or multiline (m) as needed.
- 3
Enter test string
Type or paste the text you want to test against. Matches will be highlighted in real-time.
Regular expressions (regex) are patterns used to match character combinations in strings. They're a powerful tool for searching, validating, and manipulating text. While the syntax can be cryptic, regex is invaluable for tasks like form validation, log parsing, and data extraction.
- •Validating email addresses, phone numbers, URLs
- •Extracting data from log files
- •Find-and-replace operations in code editors
- •Input validation in forms
- •Parsing structured text data
Tip: Start simple and build up. Test incrementally as regex patterns can behave unexpectedly with edge cases.