The free online radar chart maker and spider chart generator
RadarChart.io is a free radar chart maker and spider chart generator that runs entirely in your browser — no signup, no install. Build interactive radar graphs in seconds: add attributes, score values, compare multiple items on the same axes, then export a polished chart as PNG or SVG or share a live link. You can also connect RadarChart.io to ChatGPT or Claude as an MCP tool and ask your AI assistant to build radar charts for you. It's the fastest way to create radar charts, spider charts and web charts online.
Features
Everything you need to create radar charts
Powerful features that make data visualization easy and beautiful
No coding required
Build radar charts in minutes without writing a line of code. Just add attributes, score values, and you're done.
Fully customizable
Tune colors, grid style, scale, opacity, and chart type to match your brand or report.
Interactive preview
Hover any axis or point to see live values. Toggle items on and off to focus comparisons.
Multiple chart types
Switch between classic radar, radar pie for single entities, and stacked overlays in one click.
Export & share
Download high-res PNG or vector SVG, or copy a share link that encodes the whole config.
Private by default
Everything runs in your browser. No sign-up, no upload, no tracking of your data.
How it works
How to create a radar chart
1
Add your attributes
List the dimensions you want to measure — skills, features, KPIs or any comparable attributes.
2
Add items to compare
Create one item per person, product or option you want plotted on the chart.
3
Score each value
Adjust sliders or type values directly. The live preview updates as you go.
4
Export or share
Download as PNG or SVG, or copy a shareable link that encodes everything.
Use cases
When to use a radar chart
Skills & competency assessment
Visualize team or candidate strengths across skills like communication, leadership, and technical depth.
Product & competitor comparison
Score products on shared attributes — price, quality, performance, support — to spot trade-offs at a glance.
Performance reviews
Plot self, peer and manager scores on the same axes to surface alignment gaps in seconds.
Customer or market research
Compare segments, personas or brand perception across multiple weighted dimensions.
Start from a template
Browse 20+ free radar chart templates for skills, products, SWOT, performance reviews and more.
A radar chart (also known as a spider or web chart) plots multiple quantitative variables on axes that radiate from a central point. It is ideal for comparing several items across the same set of dimensions.
Is RadarChart.io free?
Yes. RadarChart.io is completely free, requires no sign-up and runs entirely in your browser — your data never leaves your device.
Can I export my radar chart?
Yes. Download your chart as a high-resolution PNG or as a vector SVG for use in slides, reports or websites.
How do I share a chart with someone else?
Use the share button to generate a link that encodes your full chart configuration. Anyone opening the link can view and edit their own copy.
When should I use a radar chart?
Radar charts work best for skill assessments, product or competitor comparisons, performance reviews and any analysis with 4 to 10 comparable attributes.
Radar chart vs. bar or line chart — which should I use?
Use a radar chart when comparing a handful of items across the same 4–10 dimensions and you want shape and balance to jump out. Bar charts are better for ranking a single attribute, and line charts are better for trends over time.
How many attributes and items can I add?
There's no hard cap, but radar charts read best with 4–10 attributes and 1–5 overlaid items. Beyond that, axes get crowded and shapes start to overlap.
What scale should I use (0–10, 0–100, or percentages)?
Any consistent scale works. 0–10 is great for skills and reviews, 0–100 or percentages work well for scores and KPIs. Just keep every attribute on the same scale so areas are comparable.
Do I need an account to use RadarChart.io?
No. There's no sign-up, no email and no paywall — open the builder and start charting immediately.
Can I embed a radar chart in slides, docs or a website?
Yes. Export as PNG for slides and docs, or as SVG for crisp scaling in presentations and on the web. You can also paste a share link that opens the live, editable chart.
How do I keep my radar chart from looking cluttered?
Limit yourself to 4–8 attributes, overlay at most 3–4 items at once, and use distinct colors with some transparency. Toggling items on and off in the builder helps focus on one comparison at a time.
Is my data private?
Yes. Charts are built entirely in your browser — nothing is uploaded to a server unless you choose to share a link, which encodes the configuration in the URL itself.
Can I use RadarChart.io with ChatGPT or Claude?
Yes. RadarChart.io exposes a Model Context Protocol (MCP) server, so you can connect it to ChatGPT (Developer mode) or Claude as a custom connector and ask your AI assistant to build, edit and share radar charts directly in chat.
What is MCP (Model Context Protocol)?
MCP is an open standard that lets AI assistants securely call external tools and services. RadarChart.io ships an MCP server so ChatGPT, Claude and other MCP-compatible assistants can browse templates, generate radar charts, and return shareable chart links.
How do I connect RadarChart.io to my AI assistant?
Open the Connect AI page, copy the RadarChart.io MCP URL, then paste it into ChatGPT's Advanced Connectors (Developer mode) or Claude's Add custom connector dialog. Once connected, ask your assistant to use RadarChart.io — for example, 'use RadarChart.io to build a skills radar for my team.'
Which AI assistants and agents are supported?
Any MCP-compatible client can connect, including ChatGPT (with Developer mode enabled) and Claude via custom connectors. As more assistants and coding agents adopt MCP, they'll be able to use RadarChart.io with no extra setup on our side.