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Regex Tester

Test regular expressions against sample text, review matches, and iterate on flags without leaving the browser.

code_blocks Codinghourglass_top Waiting for result

Matches

2

/\b[\w.%+-]+@[\w.-]+\.[A-Za-z]{2,}\b/gu

Index 9

hello@gogotem.com

Index 34

team@example.org

How this tester works

The tester builds a JavaScript regular expression from your pattern and selected flags, then scans the text and lists every match with its position.

Usage notes

  • Turn on the global flag to capture every match instead of just the first one.
  • Case-insensitive matching is useful for email, tags, and user-entered text.
  • Invalid syntax is reported immediately so you can fix the pattern quickly.

Frequently asked questions

Does this use JavaScript regex syntax?expand_more

Yes. The tester follows the browser RegExp engine, including common flags such as global, ignore-case, multiline, dotAll, and unicode.

Can I use this for quick validation patterns?expand_more

Yes. It is useful for checking email patterns, URL fragments, form rules, and text extraction logic before using them in code.

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