About This Tool

Regular expressions (regex) are powerful but cryptic. This free regex tester lets you write and test patterns against real text in real-time. See which parts of your string match, test multiple patterns, and export your regex. Whether you're validating email addresses, parsing logs, or extracting data, the regex tester helps you get it right before shipping your code.

Common Uses

Validate email, phone, or URL formats
Extract data from logs or unstructured text
Build search patterns for content matching

Just Think AI

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Regex Tester

Live regex matching against your sample text. Capture groups, named groups, and all standard flags supported.

Pattern

Sample text

Highlighted matches (5)

Just Think AI helps Real Estate, Healthcare, and HR teams ship reliable AI in two-week sprints.

Match details

#	Match	Index	Groups
1	`Just`	0	`$1: Just`
2	`Think`	5	`$1: Think`
3	`Real`	20	`$1: Real`
4	`Estate`	25	`$1: Estate`
5	`Healthcare`	33	`$1: Healthcare`

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Frequently Asked

What regex flavor does this support?: We support JavaScript regex syntax (ECMAScript). Most common patterns work, but some features vary by language.
How do I test multiple patterns?: Write your pattern, paste test text, and see matches highlighted in real-time. Adjust and re-test instantly.
Can I export my regex?: Yes. Copy your pattern directly or save it for use in your code.
Is this the same regex my backend uses?: JavaScript regex differs slightly from Python, Perl, or other languages. Test in your target language to be safe.