Last updated 24 August 2026
Bar or pie
Bar charts make it easy to compare exact sizes between items side by side. Pie charts show how parts relate to a whole, and read best when there aren't too many slices — past about six, the smaller wedges become hard to tell apart. Both update live as you edit the data, so it's easy to try both and see which makes the point more clearly.
Common questions
What format does the data need to be in?
One item per line, written as "Label, Value" — for example "January, 4200". Lines that don't match this pattern, or have a negative or missing number, are skipped rather than breaking the chart.
When should I use a bar chart instead of a pie chart?
Bar charts are easier to read when comparing exact sizes between items. Pie charts work best when the numbers are parts of one whole and the proportions, not the exact values, are the point — they get hard to read past about six slices.
Is my data uploaded anywhere?
No. The chart is drawn entirely on an HTML canvas in your browser. Nothing you type is sent anywhere.