Summfinity

Unlimited YouTube Summaries

4 formats (bullets, overview, teaser, headline), 30+ languages available, fast local GPU/NPU. A Chrome extension.

Add to Chrome - It's Free

Features

📝

4 Summary Types

Choose from 4 summary types to suit your needs.

  • ・Key Points: Extracts important points as a bulleted list.
  • ・TL;DR: A brief overview summarizing the key takeaways for busy people.
  • ・Teaser: Highlights interesting topics and must-see moments.
  • ・Headline: Expresses the core content in a single sentence, like a news headline.

Adjust summary length in 3 levels: Short, Medium, or Long.

♾️

Unlimited YouTube Summaries

On-device processing automatically leverages GPU and NPU for fast summaries, and works on CPU alone when GPU/NPU is unavailable. No external APIs means no rate limits or network latency — summaries start automatically the moment you open a video.

⏱️

Chapter Summary

Even for long videos, timestamped summaries appear progressively as they're completed — no need to wait for the entire process to finish. Both overall and chapter summaries are displayed simultaneously, and clicking a timestamp jumps you to that scene.

🌐

30+ Languages

Automatically detects the video language and outputs summaries in your preferred language. Output language can be changed in settings.

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Caching

Previously summarized videos are cached and displayed instantly when reopened.

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One-Click Copy

Copy summary results to your clipboard with a single click.

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Minimize/Expand

Minimize the panel with one click when it's in the way.

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Font Size Adjustment

Change font size in 3 levels: small, medium, or large.

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Dark Mode

Automatically matches YouTube's theme (light/dark).

Summary Examples

「Cinderella - Classic Fairy Tale」Summary of

Extracts important points as a bulleted list.(3–7 items)

Overall Summary

  • A young woman named Cinderella lives with a stepmother and stepsisters after her mother's death.
  • A fairy godmother helps Cinderella attend a royal ball, transforming a pumpkin into a coach and mice into horses.
  • At the ball, the Prince falls in love with Cinderella, but she must leave before midnight, losing a glass slipper.
  • The Prince uses the glass slipper to search for Cinderella, and it fits her perfectly.
  • Cinderella marries the Prince, and her stepsisters beg for forgiveness for their cruelty.

Chapter Summary

0:00Summary Part 1...
15:00Summary Part 2...
30:00Summary Part 3...

System Requirements

Recommended

For fast GPU/NPU-accelerated processing

  • 🎮GPU (VRAM over 4 GB) or NPU
  • 💿Storage: 22 GB+ free space in Chrome profile directory
  • 🌐Google Chrome latest version
  • 🖥️Windows 11, macOS 13+, Linux, ChromeOS (Chromebook Plus)

Required

CPU-only processing (no GPU/NPU required)

  • 🧠RAM: 16 GB or more
  • ⚙️CPU: 4 cores or more
  • 💿Storage: 22 GB+ free space in Chrome profile directory
  • 🌐Google Chrome 138 or later
  • 🖥️Windows 10/11, macOS 13+, Linux, ChromeOS (Chromebook Plus)
  • ⚠️Not supported: Android, iOS, ChromeOS (non-Chromebook Plus)