Katto is an AI-powered video clipping tool that converts long-form videos and podcasts into short, vertical clips optimized for social media. It automatically detects the best moments, reframes footage to 9:16, adds word-synced captions in 99 languages, and scores each clip on virality across four axes. Users can edit clips through a text-based interface, apply AI hooks and B-roll, and publish directly to seven platforms including TikTok, Instagram, and YouTube. Katto offers a flat monthly pricing model with no per-minute credits, along with a REST API and MCP server for programmatic use.