Regex Tester
Test regular expressions with real-time highlighting, capture groups, and detailed match statistics. All processing happens in your browser for maximum privacy.
Testing with:🟨 JavaScript
Enter a regex pattern and test string to get started, or load a sample pattern.
Keyboard Shortcuts
Ctrl+KClear AllCtrl+EnterTestCtrl+HHistory
⌨️ Keyboard Shortcuts
Clear AllCtrl+K
Test PatternCtrl+Enter
Copy PatternCtrl+Shift+C
Toggle HistoryCtrl+H
On Mac, use ⌘ (Cmd) instead of Ctrl
How to Use
Getting Started
- •Enter your regex pattern in the pattern field
- •Add your test string in the test string field
- •Results update automatically as you type
- •Load sample patterns to see examples
Regex Flags
- gGlobal - Find all matches instead of just the first
- mMultiline - ^ and $ match line breaks
- iCase-insensitive - Ignore case when matching
- uUnicode - Enable full Unicode support
- sDotAll - Dot (.) matches newlines
Common Patterns
Email Address
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ URL
https?://[^\s]+ Phone Number (US)
\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4}) Date (YYYY-MM-DD)
\d{4}-\d{2}-\d{2}