Zloth - AI YouTube Video Summarizer

Summarize long YouTube videos in one click & save time. Key takeaways, timestamped notes, custom prompts. Free — no API key.

Zloth is an AI YouTube video summarizer that lets you summarize any YouTube video — right from the thumbnail. Stop copy/pasting YouTube links to Gemini. One click, and you get AI-powered key takeaways and timestamped structured video summaries. Built in free text-to-speech feature, so read summaries out loud while you keep browsing. HOW IT WORKS Zloth adds a "Summarize" button directly to YouTube thumbnails and video pages. Click it, and an AI summary will be send to you in a moment— no copy-pasting links, no separate apps, and no API key required. CHOOSE YOUR SUMMARY STYLE Analysis — Key takeaways and main arguments, distilled into clear bullet points. Perfect to get the most important information quickly. Summary — A structured breakdown with clickable timestamps that jump you to the right moment. Great for long videos, lectures, tutorials, and anything where you want transcript-style navigation without leaving YouTube. Custom prompt — Define your own prompt to match your style. ORGANIZE YOUR VIDEO NOTES Save AI summaries to folders and build your personal video knowledge library. Sign in with Google and your library syncs across every device. Dark mode and a clean, minimal UI that stays out of your way. GENEROUS FREE TIER 120 free credits every month — 1 credit per minute of video. Upgrade to Pro for 1,500 credits/month, or grab a one-time credit pack whenever you need more. TTS High quality text-to-speech feature to read summaries out loud while you keep browsing. 8 narrators to choose from. EMAIL DELIVERY Send summaries to your inbox on your terms: per summary, daily digest, weekly digest, or off. PRIVACY Zloth only activates on YouTube. No browsing data is collected, no ads, no tracking. Your summaries are stored securely in the cloud and belong to you. PERFECT FOR Students summarizing lectures and study material. Researchers scanning talks and interviews. Professionals staying current without watching every video. Content creators analyzing competitors. Anyone who watches YouTube to learn — not to waste time. Zloth is not affiliated with, endorsed by, or sponsored by YouTube or Google LLC. YouTube is a trademark of Google LLC. Summaries are generated by AI and may be inaccurate or incomplete. Always verify important information independently.