Match all email addresses
Email: user@example.com or admin@site.org
Pattern: [a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}
Flags: g
Matches: user@example.com, admin@site.orgRegex Tester
Write and test regular expressions against sample text with live highlights.
//g
Highlighted Matches
The result will appear here.
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About this tool
Regular expressions are patterns that describe sets of strings. They are used to search, validate and transform text in virtually every programming language. Testing a regex interactively against sample input is the fastest way to develop and debug them.
This tester uses the JavaScript regex engine (ECMA-262). The supported syntax is identical to what you would use in a browser or Node.js application, so what works here will work in your code.
How to use it
- Type your regular expression in the Pattern field.
- Enable flags as needed: g (find all matches), i (ignore case), m (^ and $ match line boundaries), s (dot matches newlines).
- Paste or type your test text. Matches are highlighted immediately.
- The match list below shows each match, its position and any capturing groups.
Examples
Common problems
- The pattern shows a red error but looks correct.
- Check that special characters like (, ), [, ], {, } are properly escaped with a backslash when you mean a literal character, not a regex operator.