k6 is a developer-centric, free and open-source load testing tool built for making performance testing a productive and enjoyable experience. The k6 Cloud is a SaaS product that brings ease-of-use and convenience to organize and scale your testing.
This service is excellent! You can really destroy a backend server in less than 60 seconds with it! Just kidding!
But seriously, you can quickly get an initial test of your services with high speed. It's very easy and doesn't require coding knowledge. If you are a coder, you can enjoy it even more and customize it yourself.
Another important feature of this service is that you can run it locally.
Hail the power of JavaScript!