Two overlapping circles. Region areas convey set sizes and intersection.
A free, animated two-set venn you can read here or embed on any website, from Scrollchart.
Two-Set Venn
A two-set Venn diagram uses two overlapping circles to represent membership in two categories. The left-only region holds items belonging exclusively to set A. The right-only region holds items belonging exclusively to set B. The intersection holds items that belong to both. The three labeled counts (or percentages) tell the complete story of set membership for a two-category system.\n\nCircle sizes can be drawn proportional to set cardinality (an Euler diagram), or left as equal circles with numeric labels in the regions (the standard editorial convention used here). The numeric labels carry the quantitative information; the overlap geometry provides the structural intuition.
The diagrammatic method was introduced by John Venn in an 1880 paper in the Philosophical Magazine. Venn used overlapping circles to illustrate relations between classes in Boolean logic and syllogistic reasoning, building on Euler's earlier diagram letters. Venn was explicit that the circles were a pedagogical device for categorical logic rather than a general-purpose data visualization. Their use for quantitative set comparison (audience overlap, survey cross-tabs) came much later.
For more than two sets, Venn diagrams require increasingly complex overlapping shapes and quickly become difficult to read. A three-set diagram is manageable; four or more are generally better served by an UpSet plot or a matrix heatmap.
Editorial pages where a quick visual replaces a wall of text
Content-marketing posts that need a clean, branded illustration
Source & accuracy
This two-set venn is an editorial illustration built to represent the concept accurately. Where it shows figures, they are typical or representative values chosen to make the relationship clear, not a single underlying dataset. The diagram and its explainer are reviewed and maintained centrally, and updated over time as understanding improves.
Illustrating set intersection and exclusivity
A two-set Venn diagram comprises two overlapping circles representing two groups or categories. The left circle alone represents members of the first set only, the right circle alone represents members of the second set only, and the overlapping lens-shaped region in the middle represents members of both sets. This three-region partition clarifies which items belong exclusively to one group and which bridge both.
Size reflects membership counts
In a scaled two-set Venn, the area of each circle is proportional to the total count of members in that set. The intersection area grows larger when many members belong to both sets, and shrinks when few overlap. A diagram with minimal intersection implies the two groups are mostly distinct. Conversely, a large intersection with small exclusive regions suggests the groups have substantial overlap and may be nearly redundant.
Practical uses in business and biology
Two-set Venns are ideal for comparing product feature adoption, customer segmentation overlap, or biological species distribution. A researcher might overlay 'species present in habitat A' with 'species present in habitat B' to identify unique and shared populations. The simplicity of two circles makes it one of the few Venn variations that scales proportionally without visual distortion.
Embed this diagram
Add this animated two-set venn to your own site. Copy one line of HTML, or use the embed builder for theme and sizing options.
Reference
What this is
A free, embeddable, animated two-set venn for any website.
Who uses it
Data journalists, Researchers & academics, Content marketers, News organizations.
How to embed
Copy one line of HTML. No signup. No watermark. Works in WordPress, Webflow, Ghost, Substack, plain HTML.
File size
iframe embed, ~80 KB gzipped (loads on demand, does not block your page paint).
License
Free forever. Editorial explainer text included; updated centrally over time.
Copy the universal HTML snippet, the WordPress shortcode, or an iframe fallback -
see the WordPress plugin page for details. Any format keeps
the same Core Web Vitals profile and the same explainer text.
By embedding, you acknowledge the diagram and explainer text are served from scrollchart.com and may be updated from time to time to reflect new research or to link to relevant sources within the explainer.
Frequently asked questions
Where can I get a free animated "Two-Set Venn" for my website?
Scrollchart provides "Two-Set Venn" as a free, embeddable animated diagram you can add to any website with one line of HTML. No signup is required and there is no watermark. The diagram and its explainer text are served from scrollchart.com, so the embed stays current without any maintenance on your end.
How do I embed a two-set venn in a blog post or article?
Paste the one-line HTML snippet from the Scrollchart diagram page into your post editor. It works in WordPress, Webflow, Ghost, and plain HTML with no plugin required. The animated diagram and its explainer text load from scrollchart.com and render directly in your page DOM.