Select files
Enter the pattern and flags.
Regex Tester | Check Pattern Flags and Match Results
Test regular expression patterns and flags, then inspect match count, first index, and matched text right away.
How to use
Adjust settings
Paste the text to test.
Review and download result
Review the match count and result list.
When this tool helps most
Useful for checking validation rules, log extraction patterns, and data-cleanup regexes before using them in code.