Code editor.

An online code scratchpad, not another IDE

This page is a scratchpad for code: a fast place to draft a function, sketch a config file, or hold a snippet while you work somewhere else. Open the tab, type, then copy out or download when done. There is no project setup, no account, and nothing to install — deliberately so. It does not try to compete with full code editors; it covers the small job of holding text with real highlighting until you move it somewhere permanent.

The editing surface is Monaco Editor — the editor engine behind Visual Studio Code — loaded from the cdnjs CDN (version 0.33.0). That means proper syntax highlighting, line numbers, bracket matching, and the familiar VS Code editing feel, inside a plain static page. If the CDN is ever unreachable, the page falls back to a plain textarea carrying the same content, so your words are never trapped behind a failed script load.

It is most useful for throwaway work with a short half-life: trying out a JavaScript one-liner, drafting a JSON payload before pasting it into an API client, keeping interview-prep notes in Python, or parking a CSS fragment you are about to move into a stylesheet. For anything that needs to run, build, or live in version control, graduate it to a real editor — this scratchpad is the waiting room, not the house.

Ten languages, each with its own saved draft

The language picker switches highlighting and keeps a separate autosaved draft per language, so your Python notes survive while you sketch HTML. Three editor themes are available — Dark, Light, and high-Contrast — and the status bar under the editor always shows the live line count, character count, cursor position, and the time of the last save.

The Download button saves the current buffer as snippet.<ext> using the extension above, and Copy puts the whole buffer on your clipboard. Both act on exactly what is in the editor right now — no hidden formatting is added on the way out.

Your drafts never leave this device

About half a second after you stop typing, the current buffer is written to localStorage — the browser's own on-device storage — under one key per language (mosaic-code-<language>), alongside your picked language and theme. Reload the page next week and the same drafts are still here. Switch from JavaScript to Ruby and back, and each draft is restored untouched.

Nothing is uploaded anywhere. The page makes no data requests of its own; the only network loads are third-party assets (the Monaco Editor files from cdnjs and fonts from Google Fonts). There is no account, no analytics event carrying your text, and no server that could read it — your code physically cannot leak through this page because there is nowhere for it to be sent.

Clearing works in two levels. Reset replaces the current language's draft with the welcome snippet. To wipe everything, clear this site's stored data in your browser settings, which removes all ten language drafts plus preferences. One honest warning: because storage is local, clearing browser data — or switching devices — loses your drafts. Copy anything precious out before you wipe.

What this page deliberately does not do

• No execution. There is no run button, no terminal, and no build step — code is text here, never a program.
• No projects. One buffer at a time, no files tree, no tabs, no folders.
• No sync. Drafts live in this browser on this device. A new laptop means a fresh start.
• No extensions. Editing extras are limited to what Monaco ships over the CDN — highlighting and editing basics, nothing installable.
• CDN-dependent highlighting. If the Monaco CDN is blocked, you get the plain textarea fallback: same content, no highlighting, zero drama.

If you need execution, debugging, or collaboration, use a real IDE or a runnable playground. This page stays small on purpose — every feature it lacks is a category of bug, account, or subscription you never have to think about.