marimo

marimo is a reactive Python notebook: run a cell or interact with a UI element, and marimo automatically runs dependent cells (or marks them as stale), keeping code and outputs consistent. marimo notebooks are stored as pure Python (with first-class SQL support), executable as scripts, and deployable as apps.

Highlights.

• 🚀 batteries-included: replaces jupyter, streamlit, jupytext, ipywidgets, papermill, and more
• ⚡️ reactive: run a cell, and marimo reactively runs all dependent cells or marks them as stale
• 🖐️ interactive: bind sliders, tables, plots, and more to Python — no callbacks required
• 🐍 git-friendly: stored as .py files
• 🛢️ designed for data: query dataframes, databases, warehouses, or lakehouses with SQL, filter and search dataframes
• 🤖 AI-native: pair with AI agents like Claude Code, or use our editor's built-in AI features
• 🔬 reproducible: no hidden state, deterministic execution, built-in package management
• 🏃 executable: execute as a Python script, parameterized by CLI args
• 🛜 shareable: deploy as an interactive web app or slides, run in the browser via WASM
• 🧩 reusable: import functions and classes from one notebook to another
• 🧪 testable: run pytest on notebooks
• ⌨️ a modern editor: GitHub Copilot, AI assistants, vim keybindings, variable explorer, and more
• 🧑‍💻 use your favorite editor: run in VS Code/Cursor or PyCharm, or edit in neovim, Zed, or any other text editor

pip install marimo && marimo tutorial intro

Get started instantly with molab, our free online notebook. Or jump to the quickstart for a primer on our CLI.

A reactive programming environment

marimo guarantees your notebook code, outputs, and program state are consistent. This solves many problems associated with traditional notebooks like Jupyter.

A reactive programming environment. Run a cell and marimo reacts by automatically running the cells that reference its variables, eliminating the error-prone task of manually re-running cells. Delete a cell and marimo scrubs its variables from program memory, eliminating hidden state.

Compatible with expensive notebooks. marimo lets you configure the runtime to be lazy, marking affected cells as stale instead of automatically running them. This gives you guarantees on program state while preventing accidental execution of expensive cells.

Synchronized UI elements. Interact with UI elements like sliders, dropdowns, dataframe transformers, and chat interfaces, and the cells that use them are automatically re-run with their latest values.

Interactive dataframes. Page through, search, filter, and sort millions of rows blazingly fast, no code required.

Generate cells with data-aware AI. Collaborate on marimo notebooks with your favorite agent, such as Claude Code, Codex, or OpenCode, using marimo pair. Or, generate code in the marimo editor with an AI assistant that is highly specialized for working with data, with context about your variables in memory. Customize the system prompt, bring your own API keys, or use local models.

Query data with SQL. Build SQL queries that depend on Python values and execute them against dataframes, databases, lakehouses, CSVs, Google Sheets, or anything else using our built-in SQL engine, which returns the result as a Python dataframe.

Your notebooks are still pure Python, even if they use SQL.

Dynamic markdown. Use markdown parametrized by Python variables to tell dynamic stories that depend on Python data.

Built-in package management. marimo has built-in support for all major package managers, letting you install packages on import. marimo can even serialize package requirements in notebook files, and auto install them in isolated venv sandboxes.

This is the beginning of the README. Read the rest at the original. Read the full README ↗