Regular Expression Tester
Regular Expression Tester – Test Regex Online
Test and validate regular expressions instantly with our free online Regular Expression Tester. Enter your regex pattern and test string to see real-time matches with highlighting and detailed match information. Supports global, case-insensitive, and multiline flags for flexible pattern matching. Perfect for developers learning regex, debugging patterns, validating email addresses, extracting data, or testing search patterns. Shows match count, matched text, and helps you perfect your regular expressions before implementing in code.
About Ghufran Khan – Author
Cybersecurity Specialist & Software Developer
I am a cybersecurity specialist and software developer with 17 years of hands-on experience in information technology. Throughout my career, I have tackled complex technical challenges spanning software development to advanced security implementations, giving me a unique perspective on both building and protecting digital systems.
Why This Blog Exists
This blog was born from real frustration and real solutions. During my student years and throughout my professional career, I repeatedly encountered everyday conversion and calculation problems that wasted time and disrupted workflow. Whether it was converting units for project specifications, calculating dates for project deadlines, or formatting data for different systems, these seemingly simple tasks often required multiple tools or manual calculations prone to error.
Rather than continue accepting these inefficiencies, I decided to build the tools I wished existed: practical, accurate, and freely accessible utilities that solve real problems faced by students, developers, IT professionals, and everyday users.