If you’re new to MongoDB and coming from a primarily RDBMS background like MySQL, getting your head around the queries can be difficult at first. This handy tool allows you to convert simple SQL queries to MongoDB, it allows you to get an easy understanding of how queries work without needing to know what to search in the documentation.
There is also another tool that works well if one or the other doesn’t and is usually my first choice which is this tool called Query Mongo. Both tools are invaluable if you’re starting out with the language, the benefit of this second one is it supports more advanced queries. I’ve added both in, in-case one or the other goes down for whatever reason.