What is Markasso diagramming tool?

Markasso's a browser-based whiteboard for diagrams, built solely on Canvas API—no frameworks, keyboard-driven, with Mermaid support and custom exports.

How do you build a diagramming tool with just Canvas?

Start with Canvas 2D context for paths and shapes, layer keyboard events for navigation, parse Mermaid via JS, add export logic. Use AI like Claude for edge cases—total zero deps.

Is Markasso free and open source?

Yes, fully open on GitHub. No logins, no tracking. Fork and hack away.

🌐 Frontend & Web

Markasso: Pure Canvas Diagramming That Ditches Every Crutch

Tired of diagramming tools that fight you? Markasso strips it back to Canvas basics, proving you can own your whiteboard without a single framework.

theAIcatchup Apr 10, 2026 4 min read

Markasso diagramming tool interface showing architecture flowchart on dark canvas

⚡ Key Takeaways

Zero dependencies force clarity and true ownership over your diagrams. 𝕏
Keyboard-first design and Mermaid support make it a dev call essential. 𝕏
AI-assisted building predicts a lightweight tool renaissance. 𝕏

Published by

theAIcatchup

Ship faster. Build smarter.

#Canvas API #developer whiteboard #diagramming tool #markasso #no dependencies #zero dependencies

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Originally reported by dev.to

⚡ Key Takeaways

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