📚Dev Reference

Regex Cheat Sheet

Essential metacharacters for pattern matching.

Explanation

Regular expressions are powerful but hard to remember. This reference covers the basics.

Examples

Digit

Output

\d

Whitespace

Output

\s

Code Examples

Basics

.   - Any character
\w  - Word [a-zA-Z0-9_]
\d  - Digit [0-9]
\s  - Whitespace [ \t\n]
^   - Start of line
$   - End of line
*   - 0 or more
+   - 1 or more

Try it Now

Open in Regex Tester

💡 Tips

Use case-insensitive flags (/i) when appropriate
Escape special characters with a backslash (e.g., \.)
Start simple and build up your pattern

⚠️ Common Pitfalls

Overly complex regex is hard to read and maintain