Chart Maker
Turn a data table into a clean bar, line, pie or doughnut chart, then download it as a PNG image.
Chart type
Data
| Label | ||
|---|---|---|
Options
About the Chart Maker
The Chart Maker turns a simple data table into a polished chart you can download as an image. Type your categories and numbers into the table, choose from six chart types — bar, horizontal bar, line, area, pie or doughnut — and instantly see a crisp, proportionally scaled chart with proper axis ticks, gridlines, a legend and optional value labels. Unlike a function grapher that plots equations, this tool charts the data you provide, making it perfect for reports, homework, presentations and social posts. Everything renders in your browser, so your data never leaves your device, and the PNG export comes out at high resolution for sharp printing and slides.
How to make a chart
- 1 Enter your categories in the Label column and your numbers in the value columns. Add or remove rows as needed.
- 2 Pick a chart type — bar, horizontal bar, line, area, pie or doughnut. Add extra data series (columns) to compare multiple sets at once.
- 3 Customize the chart title, color palette, legend, gridlines and value labels in the Options panel.
- 4 Click Download PNG to save a high-resolution image of your chart.
How the chart is drawn
The chart is rendered on an HTML canvas with axis bounds computed from your data using "nice" 1/2/5×10ⁿ tick steps, so the scale always lands on round, readable numbers. Bars are grouped when you have multiple series, lines connect points at each category, and pie/doughnut slices are sized in exact proportion to each value (negative values are treated as zero for slices). The PNG export re-renders the same chart at 2× resolution onto an off-screen canvas for a crisp, presentation-ready image.
Frequently asked questions
Is the chart maker free and private?
Yes. It is completely free with no sign-up, and everything runs in your browser — your data is never uploaded to a server.
What chart types can I create?
Bar, horizontal bar, line, area, pie and doughnut charts. Bar and line charts support multiple data series for side-by-side comparison; pie and doughnut charts use the first series only.
How do I download my chart as an image?
Click the Download PNG button. The chart is exported as a high-resolution PNG file (rendered at 2× scale) that you can drop into slides, documents or social media.
Can I plot more than one set of numbers?
Yes. Use Add series to add up to five value columns. Bar charts show them as grouped bars and line/area charts draw a separate line per series, each with its own color and legend entry.
Related tools
Explore more visual and math tools on UnitConv. To plot mathematical functions like y = sin(x) instead of charting data, try the Graph Plotter.