LetDraw
LetDraw is a hand-drawn whiteboard for making diagrams that explain software and infrastructure.
What LetDraw is
LetDraw is a hand-drawn whiteboard for making diagrams that explain software and infrastructure. It can turn Mermaid and D2 code into editable shapes, then export diagrams back to either format. Other supported inputs include Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git logs, and EXPLAIN output. The canvas includes tables, code blocks, mind maps, charts, math and LaTeX, and smart connectors; exports include PNG, SVG, PDF, WebM, Mermaid, and D2. AI can create diagrams from text, images, or voice, or explain an existing diagram. LetDraw works in a browser and offline, stores drawings locally by default, and makes cloud sync optional. The free plan includes three documents, one workspace, five comments per document, and three AI prompts. Pro costs $5 per month or $50 per year and adds unlimited documents and comments, real-time collaboration, version history, and more AI. API and MCP access is limited to Pro and Enterprise; Enterprise also offers self-hosting.
Good
- Converts Mermaid and D2 code into editable shapes.
- Accepts infrastructure and software-related diagram inputs.
- Works offline and stores drawings locally by default.
- Pro includes real-time collaboration and version history.
- Enterprise offers a self-hosting option.
Watch out
- Free plan is limited to three documents.
- Free and guest users cannot create API tokens.
- LetDraw is not formally SOC 2 or ISO 27001 certified.
Who it suits
LetDraw may suit developers, DevOps and platform teams, architects, technical writers, educators, or others who need to diagram software systems. Its offline use and local-first storage may also appeal to people who prefer optional cloud syncing.
Verdict
LetDraw combines code-based diagram input with an editable canvas, offline access, and optional cloud sync. Check the plan limits if you need more documents, API access, or self-hosting.
Plans and prices
From LetDraw's own pricing page, checked 3 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 3 documents · 1 workspace · 5 comments per document · 3 free AI prompts · Free forever; no card needed |
| Pro | $5 a month | Unlimited documents and folders · Up to 10 workspaces · Unlimited comments · Real-time collaboration · Version history · More AI included · $5 / month, or $50 / year (save 2 months) |
| Enterprise | Priced on request | SSO · SCIM · Automatic domain join · Unlimited workspaces · Self-hosting option · Priority support · Custom terms for organisations |
The facts
Each one read from LetDraw's own pages, with the date it was checked.
What it does
- AI
- Users can generate diagrams from text, images, or voice, and ask AI to explain an existing diagram.checked 3 Oct 2001
- API access
- The API and MCP are available to Pro and Enterprise users; free and guest users cannot create tokens.checked 3 Oct 2001
- Audience
- The getting-started guide names software developers, DevOps and platform teams, software architects, product and project managers, technical writers, students, and educators as typical users.checked 3 Oct 2001
- Code diagrams
- It converts Mermaid and D2 code into editable shapes and can export diagrams back to Mermaid or D2.checked 3 Oct 2001
- Compliance
- LetDraw says it aligns with GDPR principles but is not formally SOC 2 or ISO 27001 certified.checked 3 Oct 2001
- Diagram tools
- The canvas includes editable tables and code blocks, mind maps, charts, math/LaTeX, smart connectors, and PNG, SVG, and PDF export.checked 3 Oct 2001
- Encryption
- Live collaboration and shared snapshots use browser-side AES-GCM end-to-end encryption, and requests use TLS with HSTS.checked 3 Oct 2001
- Infrastructure inputs
- It can generate diagrams from Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git log, EXPLAIN, Mermaid, and D2 inputs.checked 3 Oct 2001
- Integrations
- LetDraw provides a REST API and MCP server, with documentation for connecting clients including Claude and Cursor.checked 3 Oct 2001
- Privacy
- The app works in the browser and offline, stores drawings locally by default, and makes cloud sync opt-in.checked 3 Oct 2001
- Product
- LetDraw is a hand-drawn whiteboard for diagrams that explain how software works.checked 3 Oct 2001
- Self-hosting
- Enterprise includes a self-hosting option so data can stay on the customer’s own infrastructure.checked 3 Oct 2001
- Support
- The support page says most requests receive a reply within one business day, with faster replies for Pro and Enterprise.checked 3 Oct 2001
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