About Venn Diagram Maker
Create custom Venn diagrams with 2 or 3 sets. Editable labels, colors, and overlap notes. Download as PNG. Free, no sign-up.
How to use
- Pick 2 or 3 sets. 2-set diagrams have 3 regions (A, B, A∩B). 3-set diagrams have 7 regions including the center triple-overlap.
- Type a title at the top — it appears as the heading on the exported diagram.
- Set the labels and colors for each circle. Labels appear outside the circles; colors apply to both the circle outline and the optional shading.
- Fill in the region notes — the short text that appears inside each section. Use 2-4 words per region for readable layout. Empty regions are left blank.
- Toggle 'Shade circles' for translucent fills — useful for visual reports. Leave off for cleaner outline-only diagrams (preferred in textbooks and academic papers).
- Click Download PNG for a 720×560 image, or Print for hard copies.
Frequently asked questions
What is a Venn diagram used for?
Venn diagrams visualize relationships between sets — what items belong to A only, B only, both, or all groups. Used in mathematics (set theory, probability), logic (boolean operations), data analysis (audience segmentation), education (compare-and-contrast exercises), and business (overlapping skills, product features, market segments). Great for teaching kids classification — 'animals that fly vs. animals with feathers' for example shows non-bird flyers (bats) and non-flying birds (penguins) cleanly.
What's the difference between A∩B and A∪B?
A∩B (intersection) = items that are in BOTH A and B — the overlap region. A∪B (union) = items that are in EITHER A OR B (or both) — the entire shaded area when you fill in both circles. Venn diagrams visualize both: the intersection is the lens-shaped center; the union is everything except the white background.
Can I use this for school assignments?
Yes. Common school uses: comparing two books or characters (A=traits of one, B=other, A∩B=shared), classifying animals, comparing historical periods, identifying common factors in math (factors of 12 vs factors of 18 → A∩B = common factors). Hand it in as a printout or insert the PNG into a document.
Why are 4-set Venn diagrams not supported?
True 4-set Venn diagrams require all 16 regions (2⁴) to be visible — you can't do this with circles. Mathematicians use ellipses or other curves for 4+ sets, but the result is hard to read at a glance. For most practical uses, 2 or 3 sets are enough; if you need to show more groups, consider an Euler diagram (which only shows non-empty regions) or a matrix table.
Is the PNG export high resolution enough for printing?
720×560 is fine for a quarter-page diagram in a printed document at 150 DPI. For full-page printing or slide projection, you may want a larger export — let us know and we can add a resolution option. For now, the PNG is crisp at typical document sizes.
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