Visualizing Workflows with PlantUML Sequence Diagrams

How to create and embed PlantUML sequence diagrams directly into a SvelteKit blog for clear, maintainable technical documentation.

6/24/2025

Visualizing Complex Processes

One of the best ways to explain a technical process, like an authentication flow, is to visualize it. Text can be ambiguous, but a diagram provides a clear, step-by-step view of interactions between different parts of a system. PlantUML is a powerful tool that lets you create diagrams from plain text. This is fantastic for documentation because it means your diagrams can be version-controlled, diffed, and edited as easily as code.

Authentication Flow Example

Below is a sequence diagram illustrating a typical user login process in a SvelteKit application. It shows the journey from the user entering their credentials to the server validating them against a database. This diagram was generated by the <PlantUML /> component we just built.