Testing is an important part of web development, as it allows you to try features before you implement them. Ideally, you should have a website dedicated to this, but not all projects allow for it. There are also sometimes where you only want to do a quicker test to have a quick look at the way a feature works.
For WordPress plugins, there is an extremely convenient solution to test in a matter of seconds. This is how it works.
Let’s say that you are interested in trying the plugin “Formidable Forms”, which you found on the plugins directory. The plugin is at the following URL: https://wordpress.org/plugins/formidable/
In that URL, replace wordpress.org with instawp.io, it becomes https://instawp.io/plugins/formidable/
Once you hit enter, instawp goes through the following steps:
After that, you are done and logged in a temporary WordPress install that uses your plugin. You are free to test whatever you want and you are sure that you will not break anything.