Show HN: Marble – A Markdown editor with live preview and collaboration

Marble, a new Markdown editor with live preview and collaboration, launched on Hacker News, offering one-link invites that let anyone write together without an account, with notes stored as plain Markdown for compatibility with any editor or AI tool. The product targets teams seeking frictionless, real-time collaborative writing with data ownership.

Marble Markdown notes for . working together Write naturally Try editing this page Collaborate easily One link is the whole invite — anyone can write with you in seconds, no account needed. Your notes are yours Your notes live as plain Markdown — ready for any editor and any AI you connect .