Tools
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Music notation with abc.js
Engraved sheet music and in-browser playback from an ABC code block.
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Code, highlighted
Fenced code blocks across languages, with syntax colours that follow light and dark mode.
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Diagrams with Mermaid
Flowcharts, sequences, and more — drawn from a fenced code block.
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External snippets that paste in
Gists, CodePen, social embeds, and iframes — the copy-paste HTML the web hands you.
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Plain text outlasts
Plain text is the one format I trust to still open long after the apps are gone.
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Backups are a love letter to your future self
A backup is a small kindness you do now for the version of you who will need it.