hello

My name is Jan. I'm a computer scientist. I create tools.

tools

The File Tree

A collaborative file system for live coding.

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CodeMirror

A web-based code editor, to which I added Shell, OCaml, and the Monokai theme.

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Chrome Devtools

Improved the source code editor using CodeMirror.

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Chrome for Android

Added the speech recognition API.

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Firefox OS

Created the Developer HUD to track web app problems & performance.

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Firefox Devtools

Created the about:debugging page to debug internal & remote web targets.

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Janitor

A coding app making it easy to contribute to Chrome, Firefox and other cool projects.

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MetaBoard

🎲

A general board game modelling web framework with AI.

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I write code. I tweet cool things. I write about space & the future. I sometimes give talks. I do the business thing. I occasionally update my CV.