Create and share diagrams that help people get it.
UML, user journeys, roadmaps and more. Type a few words, get a beautiful diagram you can share anywhere.
Open the Playground → See Examples
7,907 diagrams rendered today
Trusted by teams at — since 2009
Three ways to create diagrams
No fiddly drag-and-drop layout. Just type, render, and share.
Type it in the editor
Write a few words of concise syntax and see your diagram update live. No alignment tools, no snapping, no layout headaches.
Generate from code or CI
Because diagrams are text, you can create them from scripts, CI pipelines, or any language that can make an HTTP request. Tool vendors use this to integrate yUML with blogs, wikis, and docs.
Embed anywhere
Drop a URL into GitHub, Slack, Confluence, Notion, or a plain
<img> tag. The SVG renders beautifully at any size.
Copy into Figma, Keynote, or Google Slides as a vector.
8 diagram types and counting
Software, product, and general-purpose diagrams — all from text
Shorter than other text-to-diagram tools.
yUML's concise syntax means fewer characters, fewer errors, and fewer AI tokens when generating diagrams with LLMs.
Built for the age of AI agents
Structured syntax
A consistent, predictable grammar that AI models can learn and reproduce reliably
API-first
Server-side rendering with a simple authenticated API — perfect for automation
Fewest tokens
The most concise syntax of any text-to-diagram tool — fewer tokens, fewer errors
Start diagramming in seconds
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