Database Mockup. Moqups is also one of the best known web ui mockup tools for free. You can edit this template and create your own diagram.
Need some mock data to test your app. Mockupdata is quick to install and very easy to use. For example mockupdata download is under 10mb.
Mockaroo lets you generate up to 1 000 rows of realistic test data in csv json sql and excel formats.
However a grid system can also be placed in the free version over the drawing area. Within minutes from the moment you decide to download you will be actually populating your tables. Tap diagram to zoom and pan. Free trial for mac and windows.
