Regex Tester

Free Online Regex Tester

Test and debug regular expressions with real-time matching and syntax highlighting. See capture groups, match positions and use common preset patterns.

Features

• Real-time matching - Results update as you type
• Highlight - Visual highlighting of all matches in the test string
• Capture groups - View captured groups for each match
• Presets - Common patterns for email, URL, IP, dates and more

Regex Flags

• g - Global: find all matches
• i - Case insensitive
• m - Multiline: ^ and $ match line boundaries
• s - Dotall: . matches newlines