Because it is plain text. It works in any editor, diffs cleanly in git so you can see exactly what changed between drafts, and will still open perfectly in twenty years. You also keep your hands on the keyboard instead of reaching for formatting toolbars.

Very little. Hash symbols for headings, asterisks for bold and italic, hyphens for bullet lists, square brackets and parentheses for links, and backticks for code. That covers the overwhelming majority of real writing — tables and footnotes are worth learning only when you need them.

Do not rely on it — download your .md file when you have written anything you care about. Treat this as a place to draft and preview rather than as permanent storage, and keep the file itself in a folder or repository where it is properly backed up.

Yes, Markdown Editor is completely free. No signup, no account, and no watermark on outputs. A Pro tier is available for 100 AI ops/day and larger file sizes.

Markdown Editor runs entirely in your browser. Your file is never uploaded — it is read, processed and saved locally, so it never reaches our servers or anyone else's. You can disconnect from the internet after the page loads and it still works.