Web Tools
Regex Cheat Sheet
Interactive regex reference with searchable patterns, categories, and a built-in live tester. Browse character classes, quantifiers, anchors, groups, lookaround, flags, and common patterns. Runs entirely in your browser.
regex regular-expression pattern reference developer-tools
Published May 28, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Browse categorized regex patterns, search by name or description, and click any pattern to see examples. Use the built-in live tester to try patterns against your own text with real-time match highlighting.
Categories
| Category | Description |
|---|---|
| Character Classes | Match specific types of characters (digits, letters, whitespace) |
| Quantifiers | Specify how many times a pattern should match |
| Anchors & Boundaries | Match positions rather than characters |
| Groups & Alternation | Group patterns and match alternatives |
| Lookaround | Assert what comes before or after without consuming |
| Flags | Modify how the regex engine processes the pattern |
| Common Patterns | Ready-to-use patterns for email, URL, IP, dates, etc. |
Features
- 48+ regex patterns organized by category
- Live tester — try any pattern against your text with real-time results
- Category filtering — browse by character classes, quantifiers, groups, etc.
- Full-text search — search patterns, descriptions, and examples
- Expandable details — click for examples and a “Try in Tester” button
- Match details — shows match text, position, and capturing groups
- Private: runs entirely in the browser — no data transmitted