This tool allows you to build and test city plans without the limitations of trying this in-game. Perhaps you don't have enough expansions yet, or missing the right buildings at the right levels, or just lack the pre-requisite research.
If you think this is missing something or believe you have spotted a bug, please get in contact and let me know about it.
Most modern browsers have a feature called local storage, which can be used to store data on your machine.
Your city will be saved in this browser only, other browsers on your machine will not be able to access it.
Although convenient, it's not recommended as long-term storage as some browsers may clear this data without your consent.
Create a link to share with your friends or for use on forums.
To load a previously created city, simply paste the link into your browser's address bar and your city will be automatically loaded.
Any subsequent saves will create new links.
You can save your city by copying the contents of the textbox on the right somewhere else, such as a text file.
Alternatively, you can load a previously made city by pasting your code into that textbox and clicking 'Load City'.