CASCII

What is CASCII?

CASCII is a free, open-source ASCII diagram builder designed for creating text-based diagrams directly in a web browser. Built entirely in vanilla Javascript with zero dependencies, CASCII requires no servers, build tools, external libraries, stylesheets, or markup to function. Users can begin creating diagrams immediately by opening a single HTML file. The tool is particularly suited for developers, technical writers, and documentation creators who need to produce ASCII art diagrams for code repositories, technical specifications, or plaintext documentation. Its lightweight architecture makes it accessible across different environments and systems without setup requirements. Key features include support for both ASCII and Unicode characters, enabling users to create a variety of diagrams from simple flowcharts to complex system architecture visualizations. The no-dependency approach ensures portability and keeps the application simple and maintainable. Being fully open-source with its code available on GitHub, CASCII allows developers to inspect the codebase, contribute improvements, or adapt the tool for their specific needs. The project is currently in beta status, indicating ongoing development while remaining functional for practical use. CASCII targets users who prefer straightforward, offline-capable solutions for diagram creation without the overhead of heavier design applications or cloud-based tools.