Enter slices
One line per slice: Label, number. Values do not need to sum to 100.
Everyday tool
Pie chart maker
Free pie chart maker: enter labels and values, show percentages, add a legend or donut hole, and download a PNG. Runs locally in your browser.
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How to use
Follow these steps for a clear answer.
Customize the chart
Set the title, slice text, legend, donut style, or rotation, then draw the preview.
Download or adjust
Save a PNG locally, or edit the data and redraw. Nothing is uploaded.
Pie chart maker specification
Version 2.0.0 · Last reviewed 2026-07-28
- Definition
- A pie chart divides a circle into slices whose angles are proportional to each category’s share of the total.
- What it calculates
- A proportional pie or donut chart from label–value pairs, with optional title, slice labels, legend, rotation, and total summary.
- Inputs
- One or more lines of Label, value (comma, colon, or tab separator)
- Optional chart title
- Slice text mode (percentage, value, label, or none)
- Legend position (right, bottom, or none)
- Donut toggle and rotation in degrees
- Outputs
- Canvas pie or donut preview
- PNG download
- Slice count and total of absolute values
- Formula
sliceAngle = 2π × |value| / Σ|values|Use the tool above to build a pie or donut chart from plain text—with title, slice labels, legend, and PNG download.
When to use a pie chart
Pie charts excel at part-to-whole comparisons with a small number of categories (budgets, survey shares, market mix). Prefer a bar graph for comparing magnitudes side by side, and a line graph for trends over time.
Data tips
- Separators:
Marketing, 35,Marketing: 35, or tab-separated pairs all work. - Values do not need to sum to 100—the tool computes shares from the total.
- Keep the slice count modest so labels stay readable.
- Draft rows in the Online Notepad before pasting them here.
Customization
Control Effect Chart title Drawn above the plot Slice text Percentage, value, label, or none on slices Legend Key on the right, bottom, or hidden Donut chart Opens a hole in the center Rotation Turns the whole pie (degrees) Download PNG Saves the current canvas locally - Separators:
- Assumptions
- Each non-empty line provides one category and one numeric value.
- Slice size uses the absolute value so negatives still contribute magnitude.
- Percentages are shares of the sum of absolute values, not required to be pre-normalized to 100.
- Rendering and download run locally in the browser.
- Units
- Category: text label
- Value: number (unitless unless described in the title)
- Percentage: 0–100 share of total
- Boundary conditions
- Empty data shows a placeholder instead of a chart.
- Very small slices may omit on-slice text to reduce clutter.
- About 5–8 slices usually read best for presentations.
- Example
- Red, 30 · Blue, 45 · Green, 25 → slices 30%, 45%, 25% of total 100
- Validation cases
- Equal values A,10 B,10 → Two 50% slices
- Values summing to 200 → Percentages still total 100%
- Donut on → Center hole with same proportions
- Slice text = percentage → Percent labels on larger slices
- Sources
- Common pie-chart practice (part-to-whole shares)
- Proportional central angles from absolute values
- Last reviewed
- 2026-07-28
- Calculation version
- 2.0.0
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Frequently asked questions
Key distinctions behind the tool.
Is this pie chart maker free?
Yes. Create and download charts with no account and no upload—everything runs in your browser.
Do my values need to add up to 100?
No. Each slice is sized as its share of the total of all absolute values you enter.
What data format should I use?
One slice per line: a label, then a comma, colon, or tab, then a number. Example: Marketing, 35.
Can I show percentages on the slices?
Yes. Set Slice text to Percentage, Value, Label, or None. Use Legend for a side or bottom key.
What is a donut chart?
A donut chart is a pie chart with a hole in the center. Enable Donut chart to switch styles.
Is my data sent to a server?
No. Parsing, drawing, and PNG export stay on your device.