The Google Charts portion of the service currently has nine visualization types including line charts, bar charts, scatter plots and maps. The interface is reasonably intuitive, allowing for simple customizing of title, axes and colors. And by "simple" I mean "obvious without documentation" -- which turns out to be important, because the site has very little written documentation so far.
The Vida.io interface for Google Chart creation
You can drag and drop the chart edges to select a specific size, allowing you to see in real time what the chart looks like as you make it larger and smaller. If you've got precise size requirements, though, note that the drag-and-drop resizing seems only to move in 10-pixel increments. That's useful so you don't have to move in ever-so-tiny increments to get a width of 640 pixels; but it also means creating, say, a 525-pixel-wide chart probably isn't going to happen.
You can see a sample of a final embedded chart below.
Resulting Vida.io graphics can be shared via URL or embedded into a Web site. Private visualizations are also available with paid accounts. Users get up to 10 private files for a standard account at $10/month and more with the $50/month Pro. To remove the "Powered by Vida.io" link, you need a Pro account.
You input your own data via typical cut-and-paste or upload-a-file options. So far the only data format supported for Google Charts is CSV; D3 charts will accept data formatted as CSV, TSV or JSON.
Vida.io inteface for creating D3 visualizations
Vida.io enters an already crowded field of Web-based data visualization tools, sites and services. What Do hopes will set it apart from competitors like Plot.ly is its focus on simplicity specifically for the well-documented Google Charts API.So, if you want to create visualizations with Google Charts and would like a Web-based option, Vida.io may be worth a look. However, if you're working on a long-term project -- something you hope will live on the Web for years, that is -- keep in mind that depending on the Google Charts API also means assuming Google won't decide to either change its Charts API or phase it out as it did with its static Chart Tools. (With D3.js, that caution doesn't apply.)
Want more free data tools? See my chart of 30+ free tools for data visualization and analysis.