MATLAB-compatible numerical computing in your browser

Free, open-source numerical computing environment compatible with MATLAB syntax. 400+ built-in functions, 2-D and 3-D plotting, and a browser IDE with no installation — plus a Node.js CLI.

• Compatible with MATLAB syntax — run existing .m scripts.
• 400+ built-in functions: linear algebra, statistics, signal processing, and more.
• 2-D and 3-D plotting.
• Runs entirely in your browser — no installation — or as a Node.js CLI (npx numbl).
• Free and open source (Apache 2.0), from the Flatiron Institute.