On: RegExr: Learn, Build and Test Regex

[blahyawnblah]

This one is my go-to. But it would be a lot better if it didn't display an alert when you try to leave the site. I've started to try and find alternatives.

[cdolan → blahyawnblah]

I don't get a warning to leave the site unless I've input data into the form. I find that to be a valuable feature and not a nag.

[dmitriid → blahyawnblah]

> I've started to try and find alternatives.

https://regex101.com/

[kroltan → blahyawnblah]

In Firefox you can set dom.disable_beforeunload to true in your about:config to disable this behaviour (globally)