Graphviz ASCII Diagram Generator

An ASCII diagram generator takes graph descriptions in DOT notation and renders them as character-art that can be used anywhere plain text is accepted. Unlike image-based graph renderers, the output is a string — you can store it in a source file, display it in a terminal, or include it in a Markdown document without any image hosting.

This generator supports both directed (digraph) and undirected (graph) syntax. It handles node labels via the label= attribute, edge labels, and the rankdir=LR directive for left-to-right layout. The three layout engines (dot, neato, fdp) use different placement algorithms so you can choose the style that best fits your graph structure.

The output grid is capped at 200 × 100 characters to remain practical for terminal use. For very large graphs, consider splitting into multiple subgraphs.