Can I test my own custom regex?

Yes. Type or paste any regex into the pattern field, enter test text, and the tester highlights matches in real time.

Are the patterns JavaScript compatible?

All patterns are JavaScript RegExp compatible. Most also work in Python and other languages with minor flag differences.

How do I copy a pattern?

Click the copy icon next to any pattern card to copy just the regex string to your clipboard.

What does the 'flags' column mean?

Flags modify matching behavior: 'i' = case-insensitive, 'g' = global (find all), 'm' = multiline anchors.

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Regex Library

Searchable library of 50+ common regular expression patterns with live tester.

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About this tool

Browse a curated catalog of over 50 ready-to-use regular expression patterns covering email addresses, URLs, phone numbers, IP addresses, dates, credit cards, hex colors, UUIDs, postal codes, and more. Each entry includes the pattern, a plain-English description, and copy-to-clipboard. The built-in live tester lets you paste any text and instantly see all matches highlighted inline so you can validate the pattern before dropping it into your code.

How to use

1 Search or browse the pattern catalog by name or category.
2 Click a pattern card to load it into the live tester.
3 Paste or type your sample text in the test area.
4 Matched portions are highlighted immediately.
5 Click the copy button to copy the pattern to your clipboard.

Frequently Asked Questions

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