Radial Arc Flow Diagram Generator
Use Radial Arc Flow Diagram Generator
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Upload a country/organization flow CSV to generate a radial arc flow diagram: a top arc segments regions with country ticks along it, and flowing curves converge downward into organization nodes sized by volume. Dark mode and PNG / SVG export, all processed locally.
About this tool
Country-level flows — who sends what to which organization — get muddy on flat maps and line charts. This radial arc diagram arranges country ticks along a top arch grouped by region; curves stream down from each tick into organization nodes sized by total volume, so direction, magnitude and geography read together. Built for aid programs, trade corridors, study-abroad and migration narratives.
- Export crisp PNG / SVG you can keep editing
- Multiple built-in themes, one-click switch
- Light and dark canvas support
- Free, no watermark, no limits
Compared with general charting workflows
| Aspect | This tool | Typical alternative |
|---|---|---|
| Visual direction | Optimized for a specific chart grammar | More general, but more setup |
| Export | Fast PNG/SVG export first | More formats, but heavier workflow |
| Best fit | Slides, landing pages, and social visuals | Building bespoke analytical charts from scratch |
Docs
What is a Radial Arc Flow Diagram?
A Radial Arc Flow Diagram visualizes how many source items (countries, regions, categories) flow into a small set of target nodes (organizations, destinations). The sources sit along a top elliptical arc segmented by group, acting like radial tick marks, while smooth Bézier curves flow from each source downward and converge into the target nodes placed along a horizontal baseline. Node size encodes total inflow, and every curve is colored by its target node — producing a beautiful “bridge with hanging strands” composition ideal for from-to analysis.
Key Features
- Template-driven, WYSIWYG: Download the CSV template, fill in your data, upload, and get a poster-grade radial arc flow diagram instantly
- Region-segmented arc: The top arc is split into segments by region (with optional sub-region in parentheses), with arc length proportional to the number of countries in each region
- Target-colored curves: Every flow curve is colored by its destination node, and bundles naturally as curves converge into the same node
- Volume-scaled nodes: Bottom node radius is mapped to total inflow, creating a clear visual hierarchy
- Direct labeling: Region names sit outside the arc, country names radiate inside it, and organization names sit below their nodes — no separate legend needed
- Light / dark modes: One-click canvas switch for presentations, reports, and web pages
- PNG / SVG export: Download as high-resolution PNG (2x) or vector SVG
- Local privacy: All data is parsed and rendered locally in your browser, never uploaded
Use Cases
- Funding & grants: Visualize which countries feed which funding organizations or research networks
- Supply chain: Show how source regions flow into distribution hubs or warehouses
- Migration & talent: Track the flow of people from origin countries to destination institutions
- Data journalism: Produce editorial-quality “source to destination” figures for reports and posters
- Academic posters: Elegant relationship figures for papers and conference presentations
How to Use
- Click “Download CSV template” to get the sample file
- Fill in your data as
country,region,target,value - Click the upload area or drag a CSV file onto the page
- The diagram renders automatically — toggle light/dark mode and hover curves or nodes to inspect values
- Click “Download PNG” or “Download SVG” to save your chart
Data Format
| Field | Required | Description |
|---|---|---|
| country | Yes | Source item (country / region / category) placed as a tick on the arc |
| region | Yes | Group name for the arc segment; use Continent (Sub) for a two-level label |
| target | Yes | Destination node (organization) |
| value | Yes | Flow volume (positive number), controls node size |
Limits: up to 120 rows; no more than 80 countries; no more than 8 target nodes.
How to read this chart
The top arch is segmented by region with country ticks along it; curves fall from each tick into organization nodes sized by total volume. Read the destinations first — which organization absorbs the most — then trace the thickest curves back to see which countries and regions feed it.
About Gotokit
Gotokit provides simple, efficient, and beautiful online tools. This radial arc flow diagram generator is powered by ECharts — no sign-up required, ready to use, with all data processed locally to protect your privacy.
FAQ
How do the country, region, target and value columns work?
Four-column CSV: country,region,target,value. Use "Continent (Sub)" for region to get two-level labels. Up to 120 rows, 80 countries, and 8 target nodes.
How are arc lengths and colors determined?
Each region segment length is proportional to its number of countries. Every curve takes the color of its target node, and node colors are assigned from a fixed palette in order of first appearance.
Is this chart tool better for slides, reports, or social visuals?
All three can work, but each needs a different emphasis. Slides care about legibility, reports care about structure and annotation, and social visuals care about density and style. Tune colors, labels, and export size for the destination.
When should I export PNG instead of SVG?
PNG is usually better for slides, chats, or social sharing, while SVG is better if you need to keep editing, scale for print, or embed the graphic in a design system. If the target platform does not support SVG, export a higher-resolution PNG.
How is this different from a general charting tool?
These tools are optimized for a specific visual grammar, so you can get to a strong result faster. General charting tools are more flexible across many chart families, but usually take more setup and styling work.
Can I use this tool on mobile phones or tablets?
Most tools work in modern mobile browsers, but complex charts, larger files, and precision drag-and-drop tasks usually feel better on desktop. If speed and control matter, desktop is the safer choice.
Is this tool better for one-off tasks or recurring workflows?
It is strongest for fast one-off tasks, quick verification, and temporary exports. If you need long-term automation, team collaboration, or deeper integration, you will usually pair it with desktop software, scripts, or a larger system.
How can I get a better result on the first try?
Start with the built-in example or with the smallest realistic sample you have. Once the format, layout, and export look right, switch to the full dataset or final asset. This is usually the fastest way to catch formatting issues early.
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