Regex Tester
3 matchesLive regex matching with group highlighting and capture extraction. Processed locally.
//
presets:
Test String
Match Highlighting
Contact us at support@0xkit.dev or sales@0xkit.dev.
You can also reach jane.doe@example.com for partnerships.
Invalid emails: @broken, missing@, not-an-email
Our office address is 123 Main St, Suite 456.
Phone: +1 (555) 867-5309, Fax: 555.123.4567
API endpoint: https://api.0xkit.dev/v1/tools
Build #2024-03-15T08:30:00Z passed all 147 tests.
Server IPs: 192.168.1.1, 10.0.0.255, 172.16.0.1
Matches3
Matches
3
Groups
2
Pattern
20 chars
Flags
gi
█ full match● $1● $2
About Regular Expressions
Regular expressions (regex) are patterns used for matching character combinations in strings. They are supported in virtually every programming language and are essential for text parsing, validation, search-and-replace, and data extraction tasks.
This tester supports all JavaScript regex features including flags: g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode), and y (sticky).
Capture groups are highlighted in different colors for easy identification. The match list shows each match with its position in the text and extracted group values.
Uses the native RegExp engine. No text is sent to any server.