For developers
Excalidraw for developers: keep your architecture diagrams organized
Developers love Excalidraw for quick architecture sketches. The problem is keeping track of them. CanvasKeep is the same Excalidraw canvas with workspaces, nested folders, and version history built in, so your system diagrams have a real home instead of living in scattered files.
The developer diagram problem
You sketch an architecture diagram during a design review. A week later, you need to update it for a new RFC. Three months later, a new hire asks how the payment service connects to the event bus, and nobody can find the diagram.
Excalidraw files end up scattered: some in Slack threads, some in a docs folder, some downloaded to your laptop, some in a random repo directory. There is no single place to find “all the architecture diagrams for this project.”
And when you do find the right file, it has been edited since the version you needed, with no way to go back.
How developers use it
Same Excalidraw canvas, with folders and version history for the diagrams developers actually draw.
System architecture diagrams
Sketch how services, databases, and queues connect. The hand-drawn style keeps the diagram at the right level of abstraction: it says "this is the plan" rather than "this is the spec." Save a checkpoint before each design review so you can compare iterations.
API flow sketches
Map out request flows across microservices during design discussions. Quick to draw, easy to update, and the informal style invites feedback rather than implying the design is final.
Database schema sketches
Rough out table relationships and data flow before writing migrations. Group related diagrams in a folder per project so they stay together as the schema evolves.
Onboarding documentation
Create architecture overviews for new team members. The visual style is approachable, and version history lets you update diagrams as the system changes without losing the original context.
Incident post-mortems
Diagram what happened during an outage: which service failed, what the blast radius was, where the fix went. Named versions let you save the "before" and "after" in the same diagram.
RFC and design doc illustrations
Add architecture sketches to design documents. The hand-drawn look matches the "proposal" tone of an RFC better than a polished Visio diagram.
What CanvasKeep adds to Excalidraw
Workspaces and nested folders
Create a workspace per team or project. Nest folders for subsystems, sprints, or whatever structure makes sense. No more hunting through Downloads or Slack history.
Named version history
Save a checkpoint with a name like “before auth-service split” or “v2 after review.” Preview any past version and restore it in one click.
End-to-end encryption
Every diagram is encrypted in your browser with AES-GCM before it reaches the server. Architecture diagrams can contain sensitive infrastructure details. The server never sees your content.
MCP server for AI workflows
Use the CanvasKeep MCP server to create and update diagrams from Claude or other AI tools. Generate architecture diagrams from code descriptions without leaving your terminal.
Frequently asked questions
- Why do developers use Excalidraw instead of draw.io or Visio?
- Excalidraw's hand-drawn style makes diagrams feel like whiteboard sketches, which is what most developers want for architecture discussions. The informal look signals "this is a working sketch" rather than "this is a finished spec." It runs in the browser with no install, and the open-source library can be embedded in other tools. draw.io is better when you need formal UML or cloud architecture shapes.
- Can I version-control Excalidraw files with git?
- You can commit .excalidraw files to a git repo. They are JSON, so they diff, but the diffs are not human-readable (coordinates and element IDs). CanvasKeep offers named version history with visual previews and one-click restore, which is easier to browse than git log when you want to go back to how a diagram looked last Tuesday.
- How do I organize Excalidraw diagrams by project?
- Plain Excalidraw has no organization. Files end up in your Downloads folder or scattered across repos. CanvasKeep adds workspaces and nested folders so you can group diagrams by project, team, or system. It uses the same Excalidraw canvas, so the drawing experience is identical.
- Is CanvasKeep free for developers?
- Yes. CanvasKeep is completely free right now. You get workspaces, nested folders, version history, and end-to-end encryption with no limits. No credit card, no trial timer.
- Does CanvasKeep have an API or MCP server?
- Yes. CanvasKeep has an MCP (Model Context Protocol) server that lets AI tools like Claude create and manage diagrams programmatically. You can generate architecture diagrams from code or descriptions without leaving your terminal.
Keep your architecture diagrams in one place
Sign up free and start organizing your architecture diagrams with folders and version history.