A diagram answers a question words struggle with: how do these parts fit together? Whether it’s a system, a network or a set of ideas, drawing it out makes the relationships obvious.
Start with the pieces
Open the diagram maker and place a shape for each thing you want to show: a service, a database, a person, a step or a concept. Label each one so the diagram makes sense without a caption. Don’t worry about placement yet; just get the pieces onto the canvas.
Show how they connect
Draw lines or arrows between the shapes to show how they relate. Add a short label along a line when the relationship needs naming (“reads from”, “sends to”, “depends on”). Arrows stay attached, so you can rearrange freely.
Arrange for clarity
A good diagram is mostly about layout. Group related shapes together, keep connecting lines from crossing where you can, and leave breathing room around clusters. Zoom out now and then to check the whole thing still reads at a glance.
Export your diagram
When it’s done, export to PNG for a quick image or SVG for a scalable version that stays crisp in documentation or slides. As with everything here, the diagram is built entirely in your browser and is never uploaded.