Are you struggling with query string url creation?
Even I was also struggling before I found this tool and now it has not just helped me creating the url but also it helped to reduce the chances of errors. That's why I thought it will be good to share with you all.
Enter your Landing page/Website url + Campaign Source (UTM source) + Campaign Medium (UTM medium) + Campaign Name (UTM Campaign) and click on create URL and your will see your generated URL in the screen. Screenshot below: