An online diagram creation tool
Draw.io is a handy and free diagramming and flowchart application that allows you to quickly draw out your content logically. It boasts strong, real-time collaboration features if connected to a Google account and all the tools you need for creating simple data representations.
Seamless
Once you visit Draw.io for the first time, you won't create an account to get started, but select a storage space - choose among various Cloud services and local storage.
The UI is straightforward enough that even first-time users can take advantage of the functions hassle-free. This program is safe, too, ensuring privacy by not storing anything you create on their servers.
Drawing
Then, decide if you want to create your diagram from scratch using the offered tools.
Alternatively, you can go for any of the templates, which come in several categories with Draw.io, from flowcharts to wireframes, mindmaps, and network diagrams.
However, note that the template section is scarce compared to the competitors such as Creately.
Tools
Draw.io offers you a range of tools that insert shapes into your diagram. You'll find basic ovals and rectangles as well as more specific stick figures, arrows, and customizable flowcharts.
Collaboration
If you decide to use this tool with Google Drive, you get to enjoy the collaboration features. Once you authenticate your Google account, you can distribute the file with others for shared editing.
Import and export
Draw.io allows you to import various visual file types including PNG, JPEG, SVG, VSDX, and more.
When it comes to exporting, you can save your diagrams in a wide array of formats, and send them over to your hard drive, cloud storage, GitHub, and more.
Price
Draw.io is 100% free to use, with no extra features coming with paid editions. The only difference in 'versions' comes with the integration you pick.
Perhaps too simple
While the features offered by Draw.io cover all the basic needs for creation and collaboration, its handiness falls short of the goal. For any heavier use, Lucidchart and PlantUml are much better choices.