Rewritly is a lightweight AI writing assistant for Mac and Windows. A small icon appears next to your text cursor in any app or website. Click it, or press Cmd+Shift+Space (Ctrl+Shift+Space on Windows), pick Fix grammar, Improve, Shorter, Longer, Formal or Friendly, or ask anything like "translate to Hindi". Press Replace and the new text goes back into the same box. Works in Gmail, Slack, WhatsApp, Notion, LinkedIn, Word and Outlook. No copy-paste.