Pie Chart Generator
TextCreate pie and donut charts from your data with custom colors, labels and legend. Label slices with values or percentages and redraw the chart as data changes.
Related Tools
About Pie Chart Generator
This pie chart generator uses Apache ECharts to render CSV or JSON data as pie and donut charts locally in your browser. It supports customizable sector colors, label modes (name, value, percentage), legend position, and inner radius for donut charts. Data input accepts CSV (label,value) and JSON (name/value arrays, e.g. [{"name":"A","value":30}]). ECharts supports sector highlight on selection, tooltip details, and legend filtering, and charts export as PNG. A pie chart exists to show how each part compares to the whole, so it suits share and composition data, not absolute magnitude, because humans judge length far better than angle or area. Keep the slice count low — beyond about seven or eight sectors it gets hard to read, so fold tiny tails into an "Other" slice. Very small shares (a few percent) become nearly invisible, making value labels far more reliable than color alone. For comparing two compositions side by side, switch to a donut and put a headline total in the center hole. Before exporting, confirm whether labels show percentages or raw values so readers do not misread the share.
How to Use
- Open the Pie Chart Generator tool
- Paste the text to process
- Adjust the output options as needed
- Click the Process button; results appear in real time
- Copy or export the result
Use Cases
- Budget allocation — Visualize budget amounts by department or project as pie charts to intuitively show fund allocation proportions.
- Market share analysis — Plot brand market share data as pie charts to compare competitive landscape and market distribution.
- Demographics — Render age group or gender population data as pie charts to show population structure composition.
- Spending breakdown — Plot personal or corporate expenses by category as pie charts to analyze spending structure and proportions.
- Voting results — Visualize vote counts for each option as pie charts to clearly show support rate proportions.
- Traffic source mix — Draw website traffic by channel (organic, direct, referral, social) as a donut chart with percentage labels.
FAQ
What is the difference between pie and donut charts?
A pie chart is a solid circle; a donut chart has a hollow center. Adjust the inner radius parameter to convert - larger inner radius means a bigger hole.
Can it show percentages?
Yes. Label display modes include name, value, or percentage; name and percentage can be shown together for readability.
Can sector colors be customized?
Yes. Customize each sector color or use the default palette. Legend position and label font size are also configurable.
What if I have too many categories?
Beyond about seven or eight sectors the chart becomes hard to read; fold the smallest shares into an "Other" slice and rely on the legend and tooltip for detail.
Is a pie chart good for comparing sizes?
Not really. Pie charts emphasize proportion, and people judge length far better than angle or area; for strict magnitude comparison use a bar chart instead.
What data formats are supported?
You can paste CSV with a label and value per line separated by a comma, or JSON as an array of objects, each with name and value fields.
Is my data uploaded?
No. Everything renders locally via ECharts and is never sent to a server, safe for unreleased financial or operations composition data.