Real-time regular-expression tester with color-highlighted matches and capture groups for developers.

Regex Tester is a developer tool that evaluates your regular expression against a test string in real time and visualizes the result. Match ranges and capture groups are highlighted in color so you can see exactly what your pattern captures, and common flags can be toggled on the fly. All matching runs locally on your device — your patterns and test text never leave the phone. The App is free and ad-supported.