I use https://www.debuggex.com/ for regular expression debugging and testing.
I find it more useful as it can show how each position of my test string relates to parts of my regular expression
I find it more useful as it can show how each position of my test string relates to parts of my regular expression
Here's a side by side comparison with the regexp I wrote to parse URLs [0]
Debuggex: https://www.debuggex.com/r/yPBRv77Rxl0Ji3Pi
Regulex: http://jex.im/regulex/#!embed=true&re=^%28https%3F\%3A%29\%2...