How to Make a Radar Chart Online

📖 8 min read 🛠️ Beginner friendly 🆓 Free tool included

A radar chart — also called a spider chart, web chart, or star plot — is one of the most efficient ways to compare multiple variables at once. Rather than reading across several separate graphs, you and your audience can look at a single polygon and immediately understand which areas are strong and which are weaker.

This guide walks through what a radar chart is, when to use one, and exactly how to build one in minutes using our free online radar chart maker — no software installation, no account required.

What Is a Radar Chart?

A radar chart displays data on multiple axes that radiate from a common center point, like spokes on a wheel. Each axis represents one variable. The value assigned to that variable is plotted as a point on its axis, and all the points are connected to form a polygon. The shape of the polygon — how wide, narrow, symmetrical, or skewed it is — tells the story of the data at a glance.

The “radar” name comes from how the chart resembles a radar screen with rings and spoke lines. You might also hear it called a kiviat diagram (after B.H. Kiviat who popularized it in the 1970s), a spider chart (because the grid looks like a web), or a star plot.

Example: 6-axis radar chart comparing two student profiles

When Should You Use a Radar Chart?

Radar charts are best suited for a specific set of scenarios. Understanding when they shine — and when another chart type would serve better — saves time and produces clearer communication.

Use a radar chart when:

You have five to eight variables you want to compare simultaneously
The variables are on the same scale (or can be normalized to one)
You want to show an overall profile rather than precise individual values
You’re comparing two or three groups across the same dimensions
Your audience needs to grasp the data pattern quickly, without reading numbers

Consider a different chart when:

You have more than nine variables (the chart becomes unreadable)
Precise numeric comparisons matter more than the overall shape
Your variables are on very different scales and can’t be normalized
You need to show trends over time (use a line chart)

Quick rule of thumb: If someone needs to ask “which number is bigger,” use a bar chart. If they need to ask “which profile is stronger overall,” use a radar chart.

Step-by-Step: How to Make a Radar Chart Online

Follow these steps to build a radar chart on Radar Chart Maker. The whole process typically takes two to four minutes for a basic chart.

Open the chart builder

Go to radarchartmaker.net and scroll to the tool panel. You’ll see a sidebar with input fields on the left and a blank canvas on the right. No login is needed to start.

Name your chart

Enter a title in the “Chart Title” field at the top of the sidebar. This appears above the chart in the exported image and helps contextualize the data for your audience.

Enter your variable names

Replace the placeholder labels (Speed, Accuracy, etc.) with your own category names. Each label becomes one axis on the radar chart. You can have between 3 and 8 variables.

Input the values

Enter a numeric score for each variable in the right-hand input column. Values should be on a 0–100 scale. If your raw data uses different units, normalize it first (divide each value by your maximum and multiply by 100).

Add a second data series (optional)

Click “Series B” to enable a comparison overlay. Enter the second set of values. The two polygons will appear in contrasting colors with transparent fills so both are visible simultaneously.

Choose your accent color

Click one of the color swatches to set the primary fill color for your chart polygon. If you’re using two series, Series A uses your chosen color and Series B uses a contrasting default.

Click “Generate Chart”

The canvas renders your radar chart. A summary panel appears below showing your top variable, average score, and the full data breakdown for each axis.

Export your chart

Use “Copy Image” to copy a PNG directly to your clipboard, or “Export Full Quality” for a high-resolution PNG and SVG suitable for print and presentations.

Try it right now →

The builder is on the homepage — no signup, no installation.

Open Radar Chart Maker

Tips for Better Radar Charts

Normalize your data before plotting

The most common radar chart mistake is plotting variables that use different units on the same axes. If one axis represents revenue in thousands of dollars and another represents customer satisfaction on a 1–5 scale, the polygon shape will be meaningless. Always convert your values to a common scale (typically 0–100 or 0–10) before building the chart.

Keep labels short

Axis labels radiate outward from the chart edge, and long labels quickly overlap with adjacent axes — especially on mobile or in smaller embedded charts. Aim for one or two words per label. If the full phrase is essential, add a legend note below the chart explaining any abbreviations.

Use fill transparency for multi-series charts

When overlaying two datasets, solid polygon fills will hide the series underneath. Set fills to 20–40% opacity so both polygons remain visible. Radar Chart Maker handles this automatically, but if you’re customizing in a design tool like Figma or Illustrator after export, watch out for inadvertently setting fills to 100%.

Watch out: Radar charts can visually exaggerate or minimize differences depending on the order of axes. Rotating which variable sits at the top (12 o’clock position) changes the polygon shape even when the data is identical. If exact shape comparison matters, keep axis order consistent across all charts in your report.

Don’t add too many series

Overlaying more than two or three datasets on the same radar chart creates a tangled web of polygons that is impossible to read. If you need to compare more groups, use small multiples — a grid of individual radar charts, one per group, all on the same scale. This is far more legible and allows the reader to absorb each profile individually before comparing across the grid.

Real-World Use Cases

Employee performance reviews

HR teams and managers use radar charts to visualize rubric-based evaluations. A six-axis chart covering skills like communication, technical ability, initiative, collaboration, problem-solving, and reliability gives a complete performance profile in a single image. Two overlapping polygons can show last quarter versus this quarter, making growth immediately visible.

Student assessment in education

Teachers building assessment rubrics find radar charts useful for parent-teacher reports and student portfolios. A radar chart for a language exam might cover reading, writing, speaking, listening, grammar, and vocabulary. The polygon shape tells the student and their parent which areas need work far more intuitively than six separate percentage scores.

Product feature comparison

Product managers and UX researchers use spider charts to map how different products score on key dimensions. Place your product on the chart alongside two or three competitors, and the resulting visual immediately highlights where you lead and where gaps exist. This makes radar charts a popular choice for competitive analysis slides in pitch decks and strategy documents.

Sports analytics

Player profiles in football, basketball, cycling, and esports are routinely visualized as radar charts. A football player’s chart might cover pace, shooting, passing, dribbling, defending, and physical strength — the exact dimensions used by popular sports databases. Overlaying two players on the same chart shows their different playing styles at a glance.

Exporting and Using Your Chart

Once generated, your radar chart can be used in several contexts. For slide decks (PowerPoint or Google Slides), a PNG at 2× resolution pastes cleanly at any size up to a full slide. For printed reports, use the SVG export, which scales without losing quality at any print resolution. For web use, a standard PNG export at screen resolution loads quickly and displays crisply on retina displays.

If you plan to embed the chart in a web page and want it to be accessible to screen readers, add descriptive alt text that summarizes the main finding — for example, “Radar chart showing that Creativity scored highest at 90 while Communication was the weakest area at 65.”