Zloth - AI YouTube Video Summarizer

Tracking since May 3, 2026.

Changelog

• Jun 8, 2026
  description

  Zloth is an AI YouTube video summarizer that gives you instant summaries of any YouTube video — right from the thumbnail. Stop watching entire videos just to find the one thing you need. One click, and you get AI-powered key takeaways, timestamped notes, and a structured video summary so you can decide in seconds whether a video is worth your time.
  
  HOW IT WORKS
  
  Zloth adds a "Summarize" button directly to YouTube thumbnails and video pages. Click it, and an AI summary appears — 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 for quick decisions on whether a video is worth watching.
  
  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 — Ask anything about the video content. Extract specific details, compare arguments, or turn a talk into study notes. (Premium)
  
  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
  
  90 free credits every month — 1 credit per minute of video. That is hours of video summaries at no cost. Upgrade to Premium for 1,500 credits/month, or grab a one-time credit pack whenever you need more.
  
  PRIVACY-FIRST
  
  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.

  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 Premium for 1,500 credits/month, or grab a one-time credit pack whenever you need more.
  
  TTS
  Free text-to-speech feature to read summaries out loud while you keep browsing.
  
  PRIVACY-FIRST
  
  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.

• Jun 8, 2026
  host_permissions

  https://www.youtube.com/*, https://ytsummarizer-production-4323.up.railway.app/*, https://wzhdmqzpqwuqkyvuwkzk.supabase.co/*

  https://www.youtube.com/*, https://ytsummarizer-production-4323.up.railway.app/*, https://wzhdmqzpqwuqkyvuwkzk.supabase.co/*, https://*.posthog.com/*, https://*.i.posthog.com/*, https://*.sentry.io/*, https://*.ingest.sentry.io/*

• Jun 8, 2026
  permissions

  activeTab, storage, tabs, windows

  activeTab, storage, tabs, windows, tts

• May 14, 2026
  description

  Stop watching entire videos just to find the one thing you need.
  
  Zloth adds a "Summarize" button directly to YouTube — on thumbnails and video pages. One click gives you an AI-generated summary powered by Google Gemini, so you can decide in seconds whether a video is worth your time.
  
  Choose how you want it summarized:
  
  Analysis — Key takeaways and main arguments, distilled into bullet points.
  Summary — A structured breakdown with clickable timestamps that jump you to the right moment.
  Custom prompt — Ask anything about the video (Premium).
  Organize and sync across devices:
  
  Save summaries to folders for easy reference later.
  Sign in with Google and your library syncs across every device.
  Dark mode and clean UI that stays out of your way.
  Generous free tier:
  
  90 free credits every month (1 credit = 1 minute of video).
  Upgrade to Premium for 1,500 credits/month, or grab a one-time credit pack whenever you need more.
  Privacy-first: 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, researchers, professionals, and anyone who watches YouTube to learn — not to waste time.

  Zloth is an AI YouTube video summarizer that gives you instant summaries of any YouTube video — right from the thumbnail. Stop watching entire videos just to find the one thing you need. One click, and you get AI-powered key takeaways, timestamped notes, and a structured video summary so you can decide in seconds whether a video is worth your time.
  
  HOW IT WORKS
  
  Zloth adds a "Summarize" button directly to YouTube thumbnails and video pages. Click it, and an AI summary appears — 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 for quick decisions on whether a video is worth watching.
  
  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 — Ask anything about the video content. Extract specific details, compare arguments, or turn a talk into study notes. (Premium)
  
  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
  
  90 free credits every month — 1 credit per minute of video. That is hours of video summaries at no cost. Upgrade to Premium for 1,500 credits/month, or grab a one-time credit pack whenever you need more.
  
  PRIVACY-FIRST
  
  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.

• May 14, 2026
  short_description

  AI-powered YouTube summaries in one click. Get key takeaways, timestamped notes, or custom analyses — right from the thumbnail.

  YouTube video summaries in one click. Key takeaways, timestamped notes & custom prompts. Free version available — no API key needed.

• May 14, 2026
  name

  Zloth

  Zloth - AI YouTube Video Summarizer

Permissions & access

Permissions

activeTabstoragetabswindowstts

Host access

https://www.youtube.com/*, https://ytsummarizer-production-4323.up.railway.app/*, https://wzhdmqzpqwuqkyvuwkzk.supabase.co/*, https://*.posthog.com/*, https://*.i.posthog.com/*, https://*.sentry.io/*, https://*.ingest.sentry.io/*

Screenshots