REAL-TIME MATCH EVALUATION

Free Regex Tester & Debugger Online

DevOS Regex Tester is an interactive online regular expression debugger that highlights pattern matches in real time as you type. It supports standard JavaScript RegExp syntax, customizable regex flags (global, case-insensitive, multiline), and zero-friction client-side evaluation without signing in.

Common Presets:

Regular Expression Pattern:Standard JavaScript RegExp

Test Target String:

Matches Found: 2

#1: team@dev-os.appIndex: 13

#2: founder@example.comIndex: 32

Save Regex Snippets in DevOS Notes

DevOS provides markdown technical documentation with full syntax highlighting for regular expressions.