Loona Bubble Chart Maker — Free Bubble Charts
Bubble charts keep the honesty of a scatter plot while drawing the eye — good for reports and classroom posters where engagement matters as much as precision.
How to use the Bubble Chart Maker
- Type your labels and numbers into the grid, or paste CSV into the box below the chart and press Apply CSV.
- Adjust the title, legend and per-series colours until the chart reads clearly at a glance.
- Press Download chart as PNG and drop the image into your document, slides or post. Use Copy my data as CSV to save your figures for later.
How it works
Points use the same axis fitting as the scatter plot: X from series one, Y from series two, ranges fitted to your data. Bubble sizes vary in a repeating pattern for visual variety. The chart is drawn by hand on an HTML canvas by Loona’s shared chart engine — no chart library and no server. Everything is computed locally, so your numbers never leave your device.
Worked example
A market researcher plots price against sales for six products. The rising bubble trail shows premium products selling more — a story worth a slide.
Frequently Asked Questions
Do bubble sizes encode data here?
In this maker, sizes vary decoratively in a fixed pattern. If exact size-encoding matters for your analysis, use the Scatter Plot Maker and say so in your caption.
What data does it need?
Two series: X values and Y values, row by row.
Can I add a trend line?
Use the Scatter Plot Maker for the least-squares trend line version.
Is my data private?
Yes — drawn entirely in your browser.