Regex Match Lab

Is your regular expression matching the right text? See the result, test the exceptions and keep your work for the next change. SEE EXACTLY WHAT MATCHES Inspect matched text and capture groups alongside your pattern. CHECK MORE THAN ONE EXAMPLE Add inputs that should match and inputs that should be rejected. Run them together to catch mistakes a single example can hide. KEEP A PATTERN YOU HAVE TESTED Save the pattern, options and test cases together. Reopen them when the pattern changes, or keep a JSON backup that restores into a separate saved suite. Patterns use the native ICU regular-expression engine.