🧩 AI Regex Builder

Visual regex constructor with real-time testing and match highlighting

📚 Pattern Library

📖 Quick Reference

. Any char
\d Digit
\w Word char
\s Whitespace
\b Boundary
^ Start
$ End
* 0 or more
+ 1 or more
? Optional
{n,m} Range
[abc] Char set
(x) Group
x|y Or
(?:x) Non-cap
(?=x) Lookahead

🔧 Regex Builder

Characters
.
\d
\D
\w
\W
\s
\S
\b
Quantifiers
*
+
?
{n}
{n,}
{n,m}
Groups & Anchors
( )
(?:)
(?=)
(?!)
[ ]
[^ ]
^
$
|
Drop zone (drag blocks here)
Drag and drop regex blocks here to build your pattern

🧪 Test String

✨ Match Results

Matches: 0

⚡ Pro Features PRO

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📚 Regex Library

  • 📧 Email (RFC 5322 compliant)
  • 🔗 URL with protocol detection
  • 💳 Credit card (Visa/MC/Amex)
  • 📱 Phone (international E.164)
  • 🏷️ Semantic version (semver)
  • 📍 IP address (v4 & v6)
  • 🔐 Strong password validator
Browse 200+ patterns

🧪 Test Suite

✓ "[email protected]" → match
✓ "[email protected]" → match
✗ "invalid@" → no match
✓ "@missing.user" → no match
✗ "spaces [email protected]" → no match
▶ Run Suite + Add Case

🌐 Multi-Language Export

Python JavaScript Java Go C# PHP Ruby Rust
import re

pattern = re.compile(
  r'^[\w.+-]+@[\w-]+\.[\w.]+$'
)
match = pattern.match(text)

🚀 Regex Builder Pro

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