I wanted to see how far I could go building a notes app using only what modern browsers already provide – no frameworks, no storage APIs, no build step.

What it does:

Single HTML file, no deps, 111 loc Notes live in the URL hash (shareable links!) Auto-compressed with CompressionStream Plain-text editor (contenteditable) History support Page title from first # heading Respects light/dark mode No storage, cookies, or tracking The entire app is the page source.