Where the text is kept
This notepad stores its contents in your browser's local storage, on your own device. Nothing is transmitted, there is no account, and no server holds a copy — which is what makes it suitable for a quick draft containing something you would not paste into a hosted document.
The corollary is that the storage is tied to one browser on one device, under one origin. Notes written in Chrome are not visible in Firefox, and notes written on a laptop are not on a phone. There is no sync, because there is nowhere to sync to.
Local storage is also not permanent. Clearing browsing data removes it, private browsing windows discard it when closed, and browsers may evict it under storage pressure — Safari in particular clears storage for sites not visited within seven days. Treat it as a scratchpad rather than an archive, and copy anything you need to keep somewhere durable.
Plain text as a format
Plain text has outlasted every proprietary document format, and the reason is that it carries no dependency on the software that produced it. A text file written in 1985 opens today; documents from word processors of the same era frequently do not. There is no version incompatibility, no licence, and no rendering engine required.
It also works with the whole ecosystem of general-purpose tools — search, diff, version control, scripting — because everything understands lines of text. Markdown became popular precisely by adding structure while remaining readable as plain text, so nothing is lost if the renderer disappears.
The limits are real: no embedded images, no formatting, no tables beyond what you draw by hand. But for notes, drafts and anything you expect to still want in a decade, the durability argument is strong. Line endings are the one portability wrinkle — Windows uses CRLF and Unix uses LF, which is why a file sometimes appears as one long line or shows stray characters when moved between systems.
Writing without the interface in the way
A deliberately plain editor exists to remove decisions. Formatting controls invite fiddling with appearance during the phase where the only thing that matters is getting words down, and the evidence from writing practice is fairly consistent that separating drafting from editing produces better results faster.
It also loads instantly and works offline, which matters more than it sounds for capturing something before it evaporates. A tool that takes ten seconds to open is a tool you do not use for a fleeting thought.
For work that needs structure, drafting here and moving to a full editor later is a reasonable division — the Markdown editor adds headings and lists while keeping the source readable, and the word counter handles length targets.