---
title: "Pie Chart Maker (Free Image Generator)"
description: "Turn a single data series into a clean pie or donut chart image. Free maker, a one-line embed that re-renders on fresh data, and an API to make charts at scale."
url: "https://www.imejis.io/blogs/tutorials/pie-chart-image-generator"
published: "2026-08-02"
---

# Pie Chart Maker (Free Image Generator)

A pie chart maker takes your slice values and slice names, a color for each, and hands back a PNG or SVG. Simple as that. These are the share-and-breakdown visuals for reports, emails, and social posts, not a spreadsheet you'll keep editing.

## What a pie chart shows

A [pie chart](https://en.wikipedia.org/wiki/Pie_chart) splits one whole into wedges. Each slice is one value, and its size is that value's share of the total. Two inputs define the chart. The **data** is the list of slice values. The **labels** are the slice names that sit on the wedges or in a legend.

The maker does the math for you:

- **Percent labels:** each slice shows its share of the whole. Good when the split is the point.
- **Raw values:** each slice shows its underlying number. Good when the absolute amount matters, like votes or dollars.

A pie reads best with a handful of slices. Three to six is the sweet spot. Past that the wedges get thin and the labels crowd, and a bar chart tells the story better. If one slice dwarfs the rest, a pie makes that obvious at a glance, which is exactly what you want in a "here's the split" panel.

Want a number in the middle? Switch to a **donut**. It's the same chart with a hole, and `innerRadius` sets how big the hole is as a fraction of the radius. That center space is perfect for a total or a headline KPI on a dashboard card.

## Make one free

Open the [pie chart maker](/tools/pie-chart-maker). Enter your slice values, name each slice, pick colors, and download the chart. No signup, no watermark, and you can export a PNG for emails and docs or an SVG when you want it crisp at any size.

The tool stays agnostic about your data. Paste values and names and it draws the wedges and a legend. Traffic sources, budget lines, poll answers, portfolio slices, none of it changes the chart. A value per slice gets you a pie. Pass a colors array for your own palette, or skip it and the built-in one fills in.

## Embed it anywhere

A chart image embeds like any other image. One line of markdown or HTML and it renders inline:

```html
<img
  src="https://your-render-url"
  alt="Traffic sources pie chart"
  width="600"
/>
```

Now the part that pays off. Aim an `<img>` at a **render URL** instead of a static file and it redraws whenever the page loads. Push fresh slice data at the end of the week and the same URL returns an updated chart. Nobody edits the email, nobody re-exports anything. A weekly breakdown image in a newsletter or a Slack post just stays current on its own.

Save a static file when you want a fixed snapshot, like a chart pinned to one quarter in a report. Go with a render URL when the picture should follow new data.

## Generate at scale

Building one pie by hand is fine. Building fifty, or one every Monday, is where the API starts to matter.

Under the hood the pie is [a component you configure](/components/pie) once and render on demand. One call takes your batch of slice data and returns the image. A few ways people wire it up:

- **On a schedule:** a cron job pulls this week's numbers, hits the render URL, and drops the chart into a Monday digest.
- **Per request:** your app renders a chart on the fly for whatever breakdown a user asks for.
- **Through an [AI agent over MCP](/agents):** the agent gathers the slice data and calls the render itself, you write no plumbing.

The [API docs](/apis) include examples that actually run, so you copy instead of guess. Set the chart up once and pour data in after.

## Start making pie charts

Feed it slices, get a pie.

- Build one now in the [pie chart maker](/tools/pie-chart-maker), free, PNG or SVG.
- Configure it as an API [component](/components/pie) and render on demand.
- Automate it through the [API](/apis) or an [AI agent](/agents).

The free plan covers [100 renders a month](/pricing), enough to wire up a weekly breakdown and see it land before you owe anything.