# Reelsub > AI-powered karaoke caption generator for short-form video — Reels, Shorts, TikTok. > Upload a video, get word-level transcription via OpenAI Whisper, and download an > MP4 with stylish karaoke captions burned in. ## What Reelsub does - Automatic speech recognition with word-level timings (English, Russian). - Six built-in caption styles: Viral Reels, Clean Expert, Big Karaoke, Podcast, Minimal, Bold Shorts. - Active-word karaoke highlight, tunable scale and pop-up animation. - Inline recognition editor — fix mistranscribed words before final render. - 9:16 export at three quality presets, MP4 with burned-in captions. ## Status Closed beta. Sign-in is Google-only and limited to an allowlist. Public registration will open later. ## Public pages - [Home](https://reelsub.app/) — what the product is and how it works. - [Features](https://reelsub.app/features) — feature-by-feature breakdown. - [Free Subtitles](https://reelsub.app/free-subtitles) — SEO landing page for free automatic karaoke subtitles. - [Free TikTok Subtitles](https://reelsub.app/free-subtitles/tiktok) — free karaoke captions specifically for TikTok videos. - [Free Reels Subtitles](https://reelsub.app/free-subtitles/reels) — free karaoke captions specifically for Instagram Reels. - [Free YouTube Shorts Subtitles](https://reelsub.app/free-subtitles/shorts) — free karaoke captions specifically for YouTube Shorts. ## Non-public surfaces (please do not crawl) - `/app` — authenticated dashboard. - `/login`, `/waitlist` — auth pages. - `/api/` — application API (auth, jobs). ## Contact For invites or partnership inquiries reach out via the project repository or by emailing the founders listed on the site.