Venn diagram builder

A clear answer. Here’s how.

Splits each list into lines, trims surrounding whitespace, ignores blank lines and removes duplicates within each set. Comparison is case-sensitive and preserves item text. Up to 1,000 lines per set, 200 characters per item and 200,000 characters per list. Each diagram region counts items in exactly that combination of sets; items in all sets are counted only in the central intersection. Circle sizes and overlap areas are fixed and are not proportional to counts. The accessible region table explains each count; the CSV lists every unique item and its set memberships. Export self-contained SVG.