25 Free Online Tools for Creating Diagrams, Processes and Charts

Need to create a bar chart, pie chart, line chart, mind map, Venn diagram, wireframe or another kind of diagram? These web applications will certainly bail you out. You no longer need to be worried about installing another software on your machine or downloading a virus. These apps are web-based, they run directly from your browser to create any kind of diagram you want.

The computer age is gradually transiting from a software-dependent one to Internet-enabled one. Thus, several online tools are successfully replacing most of the common software from Microsoft, Adobe, and other popular organizations. With the right and suitable tool for you, you can generate almost any kind of chart or diagram of high quality and great use.

Best Free Online Tools for Creating Diagrams

Below are both specialized diagramming tools like Pie Color (for pie charts) and Barchart Generator (for bar charts) as well as a multi-use diagramming tool like Hohli, Gliffy, and Creately that let you generate several kinds of charts. Test a few of them and select 2 or 3 that fit perfectly into your personal or business need.

1. Gliffy

Gliffy is an awesome tool for creating Venn diagrams, pie charts, bar charts, wireframes, SWOT analysis and several other kinds of diagrams. You can create up to 5 full-featured diagrams with a free account. However, the free account allows 1 user, 5 diagrams, 2mb storage and public diagrams only.

Gliffy Diagramming Tool

Try Gliffy

2. Bar Chart Generator

If you simply need to generate a bar chart, this tool does an excellent job. It is designed for generating great looking bar charts, but it can also help you create line charts. All you need to do is enter the required data and choose the kind of output you want – flat or 3D image.

Bar Chart Generator

Try BarChart Generator

3. Grapher

Need to create a bar chart urgently? Grapher is an easy-to-use application that lets you create nice bar charts. The interface is simple to use, with values from 0 to 80 (0, 10, 20 … to 80) on the y-axis and 6 bars of different colors on the x-axis. You simply have to enter your data for the x-axis to generate your bar chart fast. You don’t even need to sign up to create your graph.


Try Grapher

4. Hohli

Hohli lets you create several kinds of charts, including pie charts, bar charts, line charts, scatter plots, Venn diagrams, radar graphs etc. It lets you modify the dimensions of your graph as well as the background image.

Hohli Diagramming Tool

Try Hohli

5. Flowchart

Flowchart is an awesome application, but it is still in beta. So, it requires an Invitation Request. It provides free clip art images and allows collaboration real-time for users.

Flowcharting Online Tool

Try Flowchart

6. ChartGizmo

ChartGizmo is completely free to use. It lets you generate bar, pie and line graphs. It is useful to visualize scientific, financial and other kinds of data.

Chart Gizmo Diagramming Tool

Try ChartGizmo

7. Online Chart Generator

This is a simple chart generator for bar charts, pie charts, Venn diagrams, scatterplots and so on. The interface is easy to use and direct.

Online Chart Generator

Try Online Chart Generator

8. DIY Chart

DIY Chart lets you create interactive charts from static and dynamic data. It provides lots of templates and several chart types. The free account lets you create up to 5 charts.

DIY Chart

Try DIY Chart

9. Cacoo

Cacoo is a multi-purpose diagramming tool for creating wireframes, sitemaps, network charts, mind maps and other diagrams. It comes with several stencils, background sheets and other options.


Try Cacoo

10. Diagrammr

Diagrammr is a basic diagramming tool for events description. Write sentences to explain the events.


Try Diagrammr

11. Pie Color

Pie Color lets you create a simple multi-colored pie chart.

Pie Color

Try Pie Color

12. WriteMaps

WriteMaps lets you create, edit and share your sitemaps online and access them from anywhere.


Try WriteMaps

13. WiseMapping

Are you bubbling with ideas right now? Launch WiseMapping to brainstorm your ideas more easily.


Try WiseMapping

14. Mind42

This is “Mindmapping-made-easy” tool. Mind42 is a completely free web application for mind mapping. It also lets you add images and links to your diagram. You can also attach notes and more.


Try Mind42

15. Diagramly

Diagramly provides several tools for drawing almost any kind of diagram. The blank space below the toolbar shows a preview of your diagram.


Try Diagramly

16. Google Chart Tool

This awesome app from Google lets you create organizational charts, data tools, and interactive charts.

Google Chart Tool

Try Google Chart Tool

17. ChartGo

Are you into online stock market trading? Here’s a great app for creating charts for your market analysis.


Try ChartGo

18. Draw Anywhere

Draw Anywhere lets you draw flowcharts, process diagrams, organizational charts and much more. Their free account is valid only for 30 days, so don;t forget to export your data and charts after you create them.

Draw Anywhere

Try Draw Anywhere

19. Chartle

Chartle offers easy-to-use and interactive tools for creating charts.

Chartle Diagramming Tool

Try Chartle

20. Lucid Chart

Lucid Chart is useful for creating flowcharts, wireframes, UML diagrams, network diagrams, organization charts, Venn diagrams, site maps, mock-ups, mind maps and business processes. It also allows real-time collaboration. The free plan allows only 2 collaborators and 60 objects per document. However, the paid plans allow 14 days free trials.

Lucid Chart

Try Lucid Chart

21. Create A Graph

This is a simple tool that children can use to create bar, area and pie charts as well as line graphs.

Create a Graph for Kids

Try Create A Graph

22. Map Tools

Map Tools is a simple application for generating bar, line and pie charts. No need for registration. Simply select the type of chart you want and enter your values.

Map Tools

Try Map Tools

23. Fusion Charts Google Gadget

This is a great application for creating dynamic charts for your site. You can choose between several chart types and tweak many variables.

Fusion Charts Google Gaget

Try Fusion Charts Google Gadget

24. Online Charts Tool

Online Chart Tool will help you create bar, pie, bubble and line charts as well as radar plots.

Online Chart Tool

Try Online Charts Tool

25. Creately

Creately is an excellent online diagramming tool. You can use creately to create wireframes, mockups, sitemaps, organizational charts and many other diagrams.


Try Creately


Humans are visual beings. Therefore, diagrams make it easy for them to grasp information better, especially data. With online diagramming tools, you can create, share and possibly collaborate easily. They bring more efficiency and effectiveness to diagraming. So, get a suitable tool and start “diagramming”.

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