Why DFD Maker exists
Students and developers usually draw DFDs in general-purpose diagram apps. Those apps can draw boxes and arrows, but they don't know what a data flow diagram is. You search for the right shapes, number every process by hand, and find out about a “black hole” only when your guide marks it wrong.
DFD Maker is built only for data flow diagrams. The right symbols are ready in both common notations, processes and data stores are numbered for you, and a built-in checker catches the most common DFD mistakes before you submit.
What you can do
- Draw context diagrams, Level 1 and Level 2 DFDs.
- Switch between Yourdon–DeMarco and Gane–Sarson notation in one click.
- Check your diagram against DFD rules.
- Style it with themes, fonts and colours.
- Download PNG or SVG images, or save a diagram file to edit later.
Your work stays on your device
Diagrams are saved in your own browser and never uploaded to our servers. There's no account and nothing to install. Read our privacy policy for details.
How it stays free
DFD Maker is supported by advertising on our information pages. The editor itself is free to use with no limits and no watermark.
Get in touch
Found a bug, want a new feature, or need a template for your syllabus? Send us a message. We read everything.
Draw your DFD now
Free, no sign-up. Proper DFD symbols and a built-in rule checker.