Browser tool guide
How to set up diagrams.net for free (no install)
A free drawing tool that runs in your browser. Used for diagrams in the design and SCADA internships.
Last checked 18 Oct 2026.
What it is for
Time
Works on
Official page
Cost and terms
The official site says it is free forever, needs no account or sign-up, and that the source code is Apache 2.0 licensed. A desktop app is also offered.
Checked on the official site on 18 Oct 2026.
What you need
- A computer, tablet or phone with a current browser (Chrome, Edge, Firefox or Safari)
- An internet connection
- Nothing to download
Open it
1.Open app.diagrams.net.
You should see: A box asks where to save your diagram.
2.Choose Device to save to your own computer, then Create New Diagram.
You should see: A blank drawing page opens with shapes on the left.
3.Drag a rectangle onto the page and type a label.
You should see: The rectangle shows your label.
1.Open app.diagrams.net.
You should see: A box asks where to save your diagram.
2.Choose Device to save to your own computer, then Create New Diagram.
You should see: A blank drawing page opens with shapes on the left.
3.Drag a rectangle onto the page and type a label.
You should see: The rectangle shows your label.
1.Open app.diagrams.net.
You should see: A box asks where to save your diagram.
2.Choose Device to save to your own computer, then Create New Diagram.
You should see: A blank drawing page opens with shapes on the left.
3.Drag a rectangle onto the page and type a label.
You should see: The rectangle shows your label.
Check that it works
1.Draw two boxes, join them with an arrow and export the drawing as a PNG.
You should see: A PNG file of your drawing downloads.
If something goes wrong
- It asks me to sign in to save.
- Choose Device. You do not need an account.
- My drawing disappeared after closing the tab.
- Save the file with File, Save, or export it. A browser draft is not a saved file.
- Connectors do not stay attached.
- Drag the arrow end onto a shape until the shape outline turns blue, then release.
- I prefer an app.
- The official site offers a desktop app, linked as Desktop App on drawio.com.
If you cannot or do not want to install
Paper and a pen work for every exercise that asks for a drawing.
Leaving it
- Browser version: nothing to remove.
- Desktop app: remove it like any other app on your computer.
Which internships use it
- SCADA and HMI internship, in week 3.
- Electrical Design internship, in week 1.
The first 4 weeks of every internship are free. This is training, not employment, and there is no stipend. All software guides.