A plain-text scratchpad that autosaves in your browser — multiple notes, case/line utilities, find & replace, import/export, and an optional syntax-highlighted preview for code snippets.
Browse Computer Basics lessonsButtons below apply to your selection, or the whole note if nothing is selected.
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Renders the note’s text with real syntax highlighting — the same Shiki highlighter this site’s lessons use — useful for pasting a code snippet and checking it reads correctly before it goes in an assignment.
Every note is saved to this browser’s localStorage as you type — nothing is sent anywhere, and nothing survives clearing browser data or switching devices. The case/line utilities and find & replace are plain string operations on your current selection (or the whole note if nothing’s selected), same as a desktop text editor’s Format menu. The highlighted preview reuses this site’s own Shiki highlighter — the exact one lesson pages and the homepage’s code demo already ship — rather than adding a separate code-editor library just for this one tool.