Architecture whiteboards & diagrams
that move at your speed
Sketch a rough idea in seconds, then evolve it into a full C4 hierarchy — levels handles both. Drag, drop, drill in, auto-layout, Mermaid import/export. All in your browser, no signup required.
Interactive
- Free-form canvas — drop nodes anywhere for quick whiteboard sketches or structured C4 hierarchies
- Drill into any container with one click — zoom from system context down to components
- Collapse and expand nodes; implied cross-boundary edges are inferred automatically
- Drag to reparent, reorder, or group nodes. Rename inline.
- Views overlay: depth coloring, entry/exit points, connectivity analysis
Automatic
- Dagre hierarchical layout keeps diagrams clean without manual positioning
- Orthogonal edge routing with automatic waypoints and label placement
- Full undo/redo history across every operation
Interoperable
- Mermaid flowchart import and export with a live text editor
- Save and load diagrams as
.levels.json - Export as
.ls.png— a portable image with diagram data embedded - C4 model conventions supported as a first-class pattern