What presets are included?

20+ patterns covering email, phone (US and E.164), URL, UUID v4, hex color, ISO-8601 dates, IPv4/IPv6, MAC, credit cards (Visa, Mastercard, Amex), slug, domain, strong password, and more.

Which languages can I export to?

JavaScript, Python, PHP, Go, Java, and C#. Flags are converted appropriately per language (e.g. /i becomes re.IGNORECASE in Python).

Can I test my pattern?

Yes. Each preset ships with match and no-match sample inputs you can click to test, plus a free-form test field for arbitrary strings.

Regex Builder - Visual Pattern Builder with Code Generation

Status

Ready

Current state

Output

Available

104 chars

Favorite

Unpinned

Not favorited

Session

Draft

Unsaved work

Split Editor

Input on the left, output on the right

Language

SessionFlagsTest✓ match

Presets

Composer

Input1L · 48

Output2L · 104 B

Ready

const pattern = /^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$/;
const isMatch = pattern.test(input);

Diagnostics

Pattern^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za…

Flags(none)

Test inputMatches ✓

Languagejavascript

Processing completed successfully

Regex Builder

Features

Frequently Asked Questions

Split Editor

Split Editor