Best for
Teams who need a skills matrix, performance review, or competitor-comparison radar chart they can embed in a dashboard or report page.
Stack
A ready-made Radar Chart UI you can fork, run, and customize with the prompt pack below.
What's actually inside
The honest engineer's breakdown — what the Radar Charttemplate does, how it's wired, and where it's opinionated.
The Radar Chart template builds a multi-series Recharts RadarChart where each axis represents a subject or skill category and each series represents a team, product, or candidate being compared. The RadarChartCanvas is the core component: it assembles Recharts PolarGrid, PolarAngleAxis, PolarRadiusAxis, and multiple Radar polygon layers into a single chart. The DatasetToggle lets users show or hide individual series with a checkbox or ToggleGroup, and the ComparisonLegend labels each polygon with its colour.
The ScoreTooltip fires on hover to show the subject name and score for every visible series at that axis, which makes cross-series comparison much faster than reading polygon areas. The SubjectAxisLabels component controls the text shown at each axis point — rename these to match your skill names, product dimensions, or evaluation criteria. The optional DataInputPanel is a bonus: it is an editable table that lets users tweak scores directly in the UI and see the radar polygon update in real time, which is very useful for live workshops or review sessions.
Honest caveat: the DataInputPanel editing state is not persisted — refreshing the page resets all scores to the original data. If you need scores to survive a refresh, you will need to wire persistence (prompt 5 below handles this with Supabase snapshots). Also, when two series have similar or high fillOpacity values, the front polygon can obscure the back one — the fix is straightforward but not applied by default.
Key UI components
RadarChartCanvasRecharts RadarChart with PolarGrid, PolarAngleAxis, PolarRadiusAxis, and layered Radar series
DatasetToggleCheckbox or ToggleGroup to show/hide individual data series on the radar
SubjectAxisLabelsCustom tick labels on each axis showing skill or category names
ScoreTooltipCustom Recharts tooltip showing subject name and score for each series on hover
ComparisonLegendColour-coded legend row identifying each data series
DataInputPanelEditable table for adjusting scores per axis and series directly in the UI
Libraries it leans on
RechartsRadarChart, PolarGrid, PolarAngleAxis, PolarRadiusAxis, and Radar series
shadcn/ui CardWraps RadarChartCanvas for consistent layout and padding
shadcn/ui ToggleGroupDatasetToggle for showing and hiding series
shadcn/ui TableDataInputPanel editable score grid
Fork it and get it running
The entire fork-to-live process runs in the browser in about 5 minutes. No terminal or local Node.js required.
Fork the template
Go to https://v0.dev/chat/community/fGf1eA8Oxin. The community page shows the radar chart running with sample data. Click the blue Fork button in the top-right area. V0 copies the full project into your account as a new Project — takes about 15 seconds.
Tip: A free V0 account is all you need. Sign up at v0.dev if you haven't already.
You should see: A new V0 Project opens with the radar chart code and a live Vercel Sandbox preview.
Verify the preview
In the Vercel Sandbox preview, confirm that the RadarChartCanvas renders polygon fills and that SubjectAxisLabels are readable at each axis point. Hover over an axis to verify ScoreTooltip fires. Toggle a series off using the DatasetToggle and confirm the polygon disappears and the ComparisonLegend updates accordingly.
You should see: RadarChartCanvas shows polygon fills, ScoreTooltip works on hover, and DatasetToggle hides/shows series.
Update axis labels and chart title in Design Mode
Press Option+D to open Design Mode. Click the chart title text to rename it. Click the SubjectAxisLabels text elements to update category names. Design Mode edits are free — do all copy changes here before using chat credits.
Tip: Recharts SVG axis labels may not be directly editable in Design Mode if they are rendered inside SVG. Use prompt 1 below to rename axes properly via the data layer.
You should see: Chart title updates immediately in the preview. Axis label changes may require a prompt for the data layer.
Replace sample axes and scores
In the V0 chat, paste prompt 1 from the Prompt Pack below with your real axis names and score data. V0 updates the RadarChartCanvas data array, SubjectAxisLabels, ScoreTooltip, and ComparisonLegend to reflect your real categories and values.
You should see: The radar chart displays your real axis names with correct polygon shapes for each series.
Publish to a live URL
Click Share (top-right) then select the Publish tab. Click 'Publish to Production'. Vercel builds and deploys in about 30 seconds. You get a live *.vercel.app URL you can share immediately with your team.
You should see: The radar chart is publicly accessible on a Vercel subdomain.
Embed in an existing Next.js app (optional)
To add the radar chart to an existing project, open the Git panel in V0, connect to your GitHub account, and merge the V0 branch via pull request. Then import RadarChartCanvas and its supporting components into your existing Next.js pages. You will need Recharts and shadcn/ui already installed in the target project.
You should see: RadarChartCanvas imports cleanly into your existing Next.js project and renders with your data.
The prompt pack
Copy-paste these straight into v0's chat to customize the Radar Charttemplate. Each one names this template's own components — no generic filler.
Replace axes with your custom categories
Renames all axis labels and updates both series score arrays so the radar chart reflects your real evaluation criteria.
In the radar chart template, replace the sample axis subjects with my categories: [list your axes, e.g. Speed, Quality, Communication, Technical Depth, Reliability, Innovation]. Update the sample score data for two series — Team A and Team B — with these placeholder scores per axis: [list scores]. Keep the SubjectAxisLabels updated to show the new category names, the ScoreTooltip showing the score per series on hover, and the ComparisonLegend reflecting the two series colours.
Add fill opacity control slider
Gives users a live control to adjust polygon fill transparency so overlapping series remain readable.
Add a fill opacity slider (range 0% to 100%) above the RadarChartCanvas in the radar chart template. The slider should use a shadcn/ui Slider component and should control the fillOpacity prop on all Radar series simultaneously so users can toggle between a fully filled polygon view and an outline-only view. Store the opacity value in useState and pass it as a prop to each Radar series inside RadarChartCanvas.
Add a third comparison series
Adds a third polygon layer to the radar for three-way comparisons like candidate vs. candidate or product vs. product vs. benchmark.
In the radar chart template, add a third data series called [Series C name] to the RadarChartCanvas with stroke colour [#hex] and fill colour [#hex] at 0.2 opacity. Add it to the ComparisonLegend row and to the DatasetToggle options. Use this score data per axis: [paste scores]. Ensure all three polygon layers are visible simultaneously by rendering the series with the largest area value first in the component so smaller polygons are drawn on top.
Make DataInputPanel editable for live updates
Turns DataInputPanel into a live workshop tool where users can tweak scores and watch the radar polygon update instantly.
Make the DataInputPanel in the radar chart template fully editable. Each score cell should become a number input (0–100) that updates the corresponding axis score in the RadarChartCanvas data array in real time as the user types, without a page reload. Add a Reset button that restores the original sample scores. Store all edits in useState at the page level and pass the updated data array to RadarChartCanvas so the polygon shape updates immediately with each keystroke.
Save and share radar chart snapshots via Supabase
Enables permalinkable snapshots of any radar state so team members can share specific chart configurations via URL.
Add a 'Save snapshot' button to the radar chart template. When clicked, serialize the current axis names and all series scores to JSON and insert a row into a Supabase table called snapshots (id uuid default gen_random_uuid(), data jsonb, created_at timestamptz default now()). The table should have RLS disabled for inserts so anonymous users can save. Generate a shareable URL /radar/[id] that loads that exact snapshot from Supabase. Create the /radar/[id] page as a Next.js dynamic route using generateStaticParams for the 10 most recent snapshots and falling back to SSR for older ones. Pass SUPABASE_URL and SUPABASE_ANON_KEY as server-side env vars.
Fetch team scores from a Neon database
Replaces static hardcoded scores with live data from Neon PostgreSQL, refreshing hourly via Next.js ISR.
Wire the radar chart template to a Neon PostgreSQL database. Create a table team_scores (id serial primary key, team_name text, subject text, score integer, updated_at timestamptz default now()). In the radar chart page Server Component, use the @neondatabase/serverless driver in HTTP mode — const sql = neon(process.env.DATABASE_URL) — to query all rows and transform them into the Recharts RadarChart data format: an array of objects where each object is one subject and has a key per team name with its score value. Pass the transformed data to RadarChartCanvas and add export const revalidate = 3600 so scores refresh hourly via ISR without redeploying.
Gotchas when you extend it
The failures people actually hit when they push this template past its defaults — and the exact fix for each.
`window is not defined` crash on Vercel build from Recharts RadarChartWhy: Recharts RadarChart uses browser APIs including ResizeObserver and SVG measurement. Next.js SSR renders the page in Node.js where window is undefined, causing the build to crash.
Fix: Add 'use client' to RadarChartCanvas.tsx, or wrap the component in dynamic(() => import('./RadarChartCanvas'), { ssr: false }) in the parent page.
Add 'use client' to the RadarChartCanvas component file in the radar chart template so Recharts renders client-side only and the Next.js build does not crash with 'window is not defined'.
SubjectAxisLabels text gets clipped on mobile screensWhy: Recharts PolarAngleAxis renders labels at fixed positions around the circle. On narrow viewports, labels at the left and right edges fall outside the SVG viewBox and are clipped by overflow:hidden on the parent container.
Fix: Wrap RadarChart in a Recharts ResponsiveContainer and increase the outer margin. On small screens, reduce font size via a custom tick renderer passed to the PolarAngleAxis tick prop.
Fix the radar chart SubjectAxisLabels clipping on mobile by wrapping RadarChart in a ResponsiveContainer and adding a custom tick renderer that uses a smaller font size below 640px viewport width.
DatasetToggle hiding a series leaves a visual gap in ComparisonLegendWhy: The ComparisonLegend is a static array that does not react to DatasetToggle state. Hidden series still appear in the legend with their colour, misleading users about which polygons are currently displayed.
Fix: Filter the ComparisonLegend data array to only include series whose ID is in the active set maintained by DatasetToggle state.
Update the radar chart ComparisonLegend to hide entries for series that are currently toggled off in DatasetToggle, so the legend always matches what is visible on the chart.
Fill polygons overlap and the back series is completely hiddenWhy: When two series have high fillOpacity values (0.6+) or very similar shapes, the front polygon covers the back one entirely. SVG z-order follows DOM order so the last-rendered Radar series always sits on top.
Fix: Set fillOpacity to 0.2–0.3 on all Radar series and use distinct high-contrast colours. Render the series with the larger area value first in the JSX so smaller polygons appear on top.
Set fillOpacity to 0.2 on all Radar series in the radar chart template and ensure each series uses a distinct colour so overlapping polygons remain visible. Render the larger series first in the component.
Template vs. custom — the honest call
A forked template gets you far, fast. Here's where it holds up, and where you'll outgrow it.
The template is enough when
- HR or engineering team building a skills matrix or performance review visualisation for internal use
- Product team comparing features across competitors on a radar diagram for a pitch deck
- Developer who needs a working Recharts RadarChart with multiple series and a dataset toggle without building from scratch
- Workshop facilitator who wants a live score-editing tool where participants can see the radar update in real time
Go custom when
- You need animated transitions between different score states — 'before training' vs 'after training' — with Framer Motion interpolation
- The chart must be exported as a PNG or SVG for use in offline reports, slide decks, or print layouts
- Scores must be submitted by individuals and aggregated server-side across a team or survey cohort with weighted averages
RapidDev can connect the radar chart to real survey data, add team management, and export to PDF — see rapidevelopers.com.
Frequently asked questions
Is the Radar Chart v0 template free to use?
Yes. All v0.dev community templates are free to fork. Forking costs zero credits; AI chat prompts to customise the chart draw on your normal V0 credit balance.
Can I use this template commercially?
V0 community templates are published under an MIT-style license that permits commercial use without attribution. Always verify the exact license shown on the template's v0.dev community page before shipping a commercial product.
Why does my fork crash or show a blank chart after deploying to Vercel?
The most common cause is missing 'use client' on RadarChartCanvas.tsx. Recharts uses browser APIs (ResizeObserver, SVG measurement) that don't exist in Node.js. Add 'use client' to the top of the file or wrap the component in dynamic(() => import('./RadarChartCanvas'), { ssr: false }). The gotchas section above has the exact fix prompt.
How do I add my own axis names and scores?
Use prompt 1 from the Prompt Pack above. Paste it into the V0 chat with your category names and score arrays. V0 updates the RadarChartCanvas data, SubjectAxisLabels, and ComparisonLegend in one go.
My axis labels are cut off on mobile — how do I fix this?
Recharts places PolarAngleAxis labels at fixed positions around the SVG. On narrow screens they fall outside the viewBox. Wrap RadarChart in a Recharts ResponsiveContainer and add a custom tick renderer that reduces font size below 640px. Use the gotcha fix prompt above for the complete implementation.
Can I save the edited scores so they survive a page refresh?
Not out of the box — DataInputPanel edits live in useState and reset on refresh. Use prompt 5 (Supabase snapshots) to persist radar states to a database and generate a shareable URL for each saved configuration.
Can RapidDev help build a production version of this radar chart?
Yes. RapidDev connects the radar chart to real survey or evaluation data, adds team management, and can build PDF export for reports. Visit rapidevelopers.com to discuss your project.
How do I show three or more series on the radar without them overlapping?
Set fillOpacity to 0.2 on all Radar series and use high-contrast colours. Render the series with the largest polygon area first in the JSX so smaller ones appear on top. Prompt 3 in the Prompt Pack above walks through adding a third series with correct layering.
Outgrowing the template?
RapidDev turns v0 prototypes into production apps — real auth, database, and payments — at $13K–$25K.
Book a free consultation30-min call. No commitment.