Visual Builder
Edit the raw regex directly, then use “Import regex” to rebuild the visual tree when possible.
Visual regex workbench
Advanced Visual Regex Builder v3.8
Build, import, explain, test and share regex visually.
Create, test and understand regular expressions visually
CreateRegex is an advanced visual regex builder designed to help beginners and experienced developers create, test, and understand regular expressions. Build patterns step by step, visualize their structure, test them instantly against live text, and get detailed human explanations for every part of your syntax.
The tool supports groups, quantifiers, character classes, lookaheads, lookbehinds, captures, alternatives, Unicode and many other advanced regex features. It also includes a live tester, diagnostics, interactive examples and compatibility checks for JavaScript, PHP/PCRE, Python, Java, .NET and Ruby.
Regex guides and examples library
Explore practical guides covering email regex, URL regex, lookbehind assertions, regex engine differences and a complete regex cheatsheet. Every example can be tested instantly or opened directly in the visual builder.
Password Regex
Validate password strength, length and security policies.
4 examples
Email Regex
Test and understand practical email patterns you can adapt.
2 examples
URL Regex
Validate or extract URLs with interactive examples.
2 examples
Phone Number Regex
Validate international, French, US and E.164 phone numbers.
5 examples
Username Regex
Validate usernames, handles, slugs and account names.
6 examples
Date Regex
Validate DD/MM/YYYY, ISO dates and timestamps.
5 examples
IP Address Regex
Validate IPv4, private IP ranges, CIDR notation and IPv6 basics.
5 examples
UUID Regex
Validate UUID v4, UUID v1-v5 and UUIDs without hyphens.
4 examples
Hex Color Regex
Validate CSS hex colors like #fff, #ffffff and alpha colors.
6 examples
Domain Name Regex
Validate domains, subdomains, TLDs and lowercase domain names.
6 examples
Slug Regex
Validate SEO-friendly slugs and URL-safe identifiers.
5 examples
Regex Cheatsheet
Quickly find anchors, classes, groups and quantifiers.
5 examples
Regex Tutorial
Learn regular expressions step by step from the basics.
3 examples
JavaScript Lookbehind
Understand lookahead, lookbehind and compatibility limits.
2 examples
JavaScript Regex vs PCRE
Compare regex engines, flags and feature support.
2 examples