Regex Tester
Test regular expressions against sample text, inspect matches, and preview replace output.
Regular expressions are a powerful pattern-matching language used in programming for validation, search, replace, and text extraction. Getting a regex right can be tricky without a way to test it interactively.
This regex tester lets you write a pattern, test it against sample text, and see all matches, groups, and captured values in real time. You can also test replacement operations, making it easier to validate patterns while debugging forms, search logic, parsing rules, and text replacements.
Regex Setup
Matches
2 foundhello@example.com
Index: 0
team@0918.us
Index: 32
Replace Output
How to Use
Follow these quick steps to get the result you need.
Enter a regex pattern and flags, then paste test text into the input area.
Review the list of matches to see what the pattern captures and where it matches.
Use the replacement field to preview find-and-replace behavior before using the regex in code.
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