Regex Tester
Test and debug regular expressions with real-time matching
Regular Expression Tester
Quick Patterns
Statistics
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Total Matches0
Groups0ms
Execution TimeUsage Examples
Email Validation
Validate and extract email addresses from text using regex patterns.
/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/g
URL Extraction
Find and extract URLs from any text content using regular expressions.
/https?:\/\/[\w\-]+(\.[\w\-]+)+/g
Phone Number Parsing
Parse and validate phone numbers in various international formats.
/\+?\d{1,4}[-.\s]?\(?\d{1,3}\)?[-.\s]?\d{1,4}/g
Features
Match Highlighting
Visual highlighting of all matches in the test string
Regex Flags
Support for global, case-insensitive, multiline and dotAll flags
Quick Patterns
Pre-built patterns for common use cases like email, URL, phone
Group Details
View capture groups and named groups for each match
Statistics
Match count, group count and execution time metrics
Real-Time Testing
Results update automatically as you type
Error Handling
Clear error messages for invalid regex patterns
Privacy
All processing in browser, no data sent to servers
How to Use?
Enter Pattern
Type your regular expression pattern in the pattern input field.
Set Flags
Choose the appropriate flags: global, case-insensitive, multiline, dotAll.
Enter Test String
Paste or type the text you want to test against your regex pattern.
View Results
See highlighted matches and detailed match information including groups.
Use Quick Patterns
Try pre-built patterns for common tasks like email or URL validation.
Frequently Asked Questions
Online Regex Tester and Debugger
Regex is that thing everyone googles every single time. Paste your pattern, paste your text, and see matches highlighted instantly. No more guessing if your pattern is right - you'll know in real time.
Regular Expression Pattern Matching
Debugging regex is painful without the right feedback. This tester shows you capture groups, match positions, and execution stats so you can figure out exactly why your pattern isn't catching what you expect.
Quick Regex Patterns for Common Tasks
Can't remember the email validation pattern? Or how to match a URL? Hit the quick patterns and load common regex for emails, URLs, phone numbers, IPs, and dates with one click. Saves you a Stack Overflow trip.
Regular Expressions (Regex) Complete Guide: Patterns, Syntax & Real Examples (2026)
Master regex from scratch. Learn character classes, quantifiers, groups, lookaheads, and real-world patterns for email validation, URL parsing, log analysis, and more.