Technologies
What is marimo built with?
marimo is a Python repo built with FastAPI, starlette, uvicorn, React, and Vite. It uses AI through ai and @ai-sdk/react, makes its content with markdown, marked, dompurify, html-to-image, katex, and 3 more, validates its data with msgspec, jsonschema, @hookform/resolvers, and Zod, is tested with pytest-asyncio, Pytest, Vitest, Testing Library, @playwright/test, and 1 more, and deploys with psutil. It has 907,947 written lines, with 1,461 test files.
Read on November 4, 2026, at commit b62dfd4. Read it as markdown
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frontend
Frontend
Styles
- Tailwind CSS
class-variance-authority22 files
- @radix-ui/colors2 files
- PostCSS1 file
tailwind-merge1 file
Interface
- CodeMirror104 files
- TanStack49 files
- Radix UI42 files
- React Hook Form21 files
vega-lite16 files
@uiw/react-codemirror12 files
react-aria-components12 files
@marimo-team/codemirror-languageserver9 files
- react-arborist9 files
react-resizable-panels9 files
- reactflow9 files
@uidotdev/usehooks7 files
dnd-kit7 files
- @lezer/highlight5 files
- cmdk5 files
@replit/codemirror-vim3 files
react-dropzone3 files
react-dnd2 files
react-error-boundary2 files
- Swiper2 files
@dagrejs/dagre1 file
- Mermaid1 file
- react-grid-layout1 file
- react-virtuoso1 file
- Vega1 file
xterm1 file
Icons
- Lucide227 files
- @radix-ui/react-icons7 files
Backend
AI
ai21 files
Support
Content
Validation
@hookform/resolvers6 files
Testing
- Vitest573 files
- Testing Library202 files
@playwright/test25 files
msw1 file
Tools
- vscode-languageserver-protocol7 files
@vitejs/plugin-react1 file
sql-formatter1 file
- Storybook1 file
Other
jotai239 files
- Lodash14 files
pyodide9 files
- @lezer/common8 files
- clsx5 files
- date-fns5 files
- @paralleldrive/cuid22 files
- lz-string2 files
- humanize-duration1 file
jotai-scope1 file
- path-to-regexp1 file
web-vitals1 file
packages/client
Support
Validation
- Zod3 files
Testing
- Vitest10 files
packages/lsp
Support
Testing
- Vitest2 files
Other
- minimist1 file
- ws1 file
packages/openapi
Support
Tools
openapi-typescript1 file
- TypeScript1 file
Other
packages/smart-cells
Frontend
Interface
- @codemirror/lang-python1 file
Support
Testing
- Vitest5 files
Other
- @lezer/common2 files
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