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LetDraw
What it is
LetDraw is a hand-drawn whiteboard for diagrams that explain software and infrastructure. It converts Mermaid and D2 code into editable shapes, then exports diagrams to Mermaid, D2, PNG, SVG, PDF, or WebM. Inputs can include Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git log, EXPLAIN, Mermaid, and D2. Its canvas provides editable tables, code blocks, mind maps, charts, math and LaTeX, plus smart connectors. AI can create diagrams from text, images, or voice and explain an existing diagram. The browser-based app works offline, stores drawings locally by default, and makes cloud sync optional. Live collaboration and shared snapshots use browser-side AES-GCM end-to-end encryption, while requests use TLS with HSTS. A free plan includes three documents, one workspace, five comments per document, and three AI prompts. Pro costs $5 per month or $50 per year. API and MCP access require Pro or Enterprise.
For and against
For
- Converts Mermaid and D2 code into editable shapes
- Imports infrastructure and database definition formats
- Includes mind maps, charts, tables, and code blocks
- Works offline with local storage by default
- Exports PNG, SVG, PDF, Mermaid, D2, and WebM
Against
- Free plan limits documents and workspaces
- API and MCP require Pro or Enterprise
- No free trial is listed
- Enterprise pricing is custom
The verdict
LetDraw combines code-based diagram conversion with a broad visual canvas and optional AI generation. Its free plan supports basic work, while collaboration, API access, and larger limits require paid tiers.
Who it suits
It suits software developers, DevOps and platform teams, architects, technical writers, product managers, students, and educators who need editable technical diagrams.
Plans and prices
Free
3 documents · 1 workspace · 5 comments per document · 3 free AI prompts
Read 3 Oct 2026 · letdraw.com
Pro
Unlimited documents and folders · Up to 10 workspaces · Unlimited comments · Real-time collaboration
Read 3 Oct 2026 · letdraw.com
Enterprise
SSO · SCIM · Automatic domain join · Unlimited workspaces
Read 3 Oct 2026 · letdraw.com
On the record
- AI
- Users can generate diagrams from text, images, or voice, and ask AI to explain an existing diagram.docs.letdraw.com · read 3 Oct 2026
- API access
- The API and MCP are available to Pro and Enterprise users; free and guest users cannot create tokens.docs.letdraw.com · read 3 Oct 2026
- 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.docs.letdraw.com · read 3 Oct 2026
- Code diagrams
- It converts Mermaid and D2 code into editable shapes and can export diagrams back to Mermaid or D2.letdraw.com · read 3 Oct 2026
- Compliance
- LetDraw says it aligns with GDPR principles but is not formally SOC 2 or ISO 27001 certified.letdraw.com · read 3 Oct 2026
- Diagram tools
- The canvas includes editable tables and code blocks, mind maps, charts, math/LaTeX, smart connectors, and PNG, SVG, and PDF export.letdraw.com · read 3 Oct 2026
- Encryption
- Live collaboration and shared snapshots use browser-side AES-GCM end-to-end encryption, and requests use TLS with HSTS.letdraw.com · read 3 Oct 2026
- Infrastructure inputs
- It can generate diagrams from Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git log, EXPLAIN, Mermaid, and D2 inputs.letdraw.com · read 3 Oct 2026
- Integrations
- LetDraw provides a REST API and MCP server, with documentation for connecting clients including Claude and Cursor.docs.letdraw.com · read 3 Oct 2026
- Privacy
- The app works in the browser and offline, stores drawings locally by default, and makes cloud sync opt-in.letdraw.com · read 3 Oct 2026
- Product
- LetDraw is a hand-drawn whiteboard for diagrams that explain how software works.letdraw.com · read 3 Oct 2026
- Self-hosting
- Enterprise includes a self-hosting option so data can stay on the customer’s own infrastructure.letdraw.com · read 3 Oct 2026
- Support
- The support page says most requests receive a reply within one business day, with faster replies for Pro and Enterprise.letdraw.com · read 3 Oct 2026
