Sankey diagrams, made simple.
Type or paste a simple From / To / Amount table and watch it become a clean, shareable flow diagram. No accounts, no uploads, no fuss.
Free while in early access. No account needed. Works best on a laptop or desktop.
Want to hear about new features?
Occasional updates only. No spam, unsubscribe any time.
Everything you need, nothing you don't
SimpleSankey does one thing well: it turns a table into a diagram you can be proud to put in a report or slide.
Private by design
It runs entirely in your browser. Your numbers never leave your device and there is nothing to upload.
Paste straight from Excel
Copy From, To and Amount columns from a spreadsheet and paste. A built-in data check flags problems as you go.
Looks good out of the box
Balanced automatic layout, soft colour palettes and tidy labels. Fine-tune colours, spacing and positions when you want to.
Number formatting
Add currency symbols, suffixes, decimal places and thousands separators to labels and hover tips.
Export and share
Save your work as a project file and export your diagram as an image to drop into documents and presentations.
Undo, redo, nudge
Move nodes with the keyboard, select several at once, snap to a grid and step back through changes.
Three steps to a finished diagram
From blank page to something you can share in a couple of minutes.
Type or paste rows of From, To and Amount. Not sure how to format it? Built-in help gives you a prompt to use with your own AI assistant.
Pick colours, label styles and spacing. Click a node to recolour or move it.
Download your diagram as an image, or save the project and come back to it later.
Stay in the loop
SimpleSankey is in early access and still growing. Leave your email and we'll tell you about new features.
We'll only use your email to tell you about SimpleSankey updates. See our privacy notice.