The Best YouTube Summarizer Tools in 2026

Updated November 3, 2026 · Summ team

There are now dozens of tools that promise to summarize any YouTube video in seconds. Most of them work the same way under the hood: they pull the video's transcript and pass it to a language model. The differences are in where they live (phone app, browser extension, website, chatbot), how the output is organized, and what you can do with it afterward.

Short answer: for phones, Summ is a good pick because it works straight from the YouTube app's share button. For desktop browsers, extensions like Eightify and Glasp show summaries next to the video. For custom questions, paste a transcript into ChatGPT, Gemini or Claude. Pick based on where you watch.

A note on fairness: Summ is our product, and it's listed first. We've tried to describe the others accurately and briefly. Features and prices change often, so check each tool's own site before you decide.

How we looked at these tools

• Where it works: phone, desktop browser, or both.
• Output: just a paragraph, or structured key points and timestamped chapters you can check against the video.
• Accuracy: whether the summary is built from the real transcript.
• Extras: languages, saving, listening, other content types.
• Cost model: free tier, trial or subscription (no specific prices here, since they change).

1. Summ (our app): best for iPhone and Android

Summ is a mobile app for iPhone, iPad and Android that summarizes YouTube videos, web articles and pasted text. You can paste a link, but the faster way is to tap Share in the YouTube app and choose Summ.

• Summaries include a brief overview, key points, and chapters with timestamps.
• You can choose the summary length.
• Summaries are available in 50+ languages.
• Text-to-speech lets you listen to a summary instead of reading it.
• Everything is saved to an offline library.
• Full transcript with timestamps, exportable as TXT, SRT or VTT.
• Free plan with a daily limit; premium for unlimited summaries.

Good fit if: you watch YouTube mostly on your phone, or want summaries saved in one place. Less ideal if: you only use a desktop browser and want the summary inside the YouTube page. In that case you can still look up videos already in Summ's library on summ.site, and browse ready-made summaries in the summaries library.

Get it on the App Store or Google Play, or browse example summaries first.

2. Eightify: browser extension for desktop

Eightify is a browser extension that adds an AI summary to YouTube video pages. It's built around showing the main ideas of a video while you're on youtube.com, so you don't have to copy links anywhere. It has paid plans alongside limited free use.

Good fit if: you watch on a desktop browser and want summaries in place. If you're weighing it against a mobile option, see our Eightify alternative comparison.

3. NoteGPT: web tool for summaries and notes

NoteGPT is a website (with browser extensions) for summarizing YouTube videos and other content, with a focus on study and note taking. You paste a link and get a summary and transcript, and it offers additional study-oriented features.

Good fit if: you're a student and want a web-based notes workflow. For notes on your phone with the Summ app, try YouTube to Notes.

4. Glasp: YouTube summary extension

Glasp is known for its web highlighting tool, and it also makes a YouTube summary extension. The extension shows the transcript next to the video and sends it to an AI chatbot of your choice to generate a summary.

Good fit if: you already use a chatbot and want a quick way to send it YouTube transcripts from your desktop browser.

5. ChatGPT, Gemini or Claude (with the transcript)

General chatbots write good summaries and let you ask follow-up questions, which dedicated summarizers usually don't. The catch is getting the content to them. Whether a chatbot can open a YouTube link varies by product, plan and date, and some will guess from the title. Gemini has a YouTube integration in some regions and accounts.

The dependable approach is to copy the transcript (from YouTube's "Show transcript" panel or the Summ app) and paste it in. Our guide Can ChatGPT watch YouTube videos? explains the details.

Good fit if: you want custom analysis, comparisons or quizzes, and don't mind an extra step.

6. YouTube's own AI features

YouTube has tested AI features of its own, including an "Ask" button that answers questions about a video and AI-generated summaries on some videos. Availability depends on your region, language, account type and the specific video, and these features have changed over time. If you see them, they're the most convenient option since there's nothing to install.

Good fit if: it's available to you. If not, YouTube's free "Show transcript" option is always worth knowing about; here's how to find it.

Comparison table

Features, limits and prices change. Check each site for current details.

Which one should you pick?

• You watch on your phone: a mobile app that accepts shared links. That's what we built Summ for.
• You watch on a laptop and want summaries in place: a browser extension like Eightify or Glasp.
• You want notes for studying: NoteGPT, or Summ (see YouTube to Notes).
• You want to interrogate the content: a chatbot plus the transcript.
• You just need the text: skip summarizers and use a transcript tool. See how to copy or download a YouTube transcript.

What to watch out for with any summarizer

Every tool here depends on captions. Videos without them will give poor results or none. Auto-captions mishear names and numbers, and those errors carry into the summary. Visual content, like a chart or a code demo, isn't in the transcript, so it won't be in the summary. Timestamped chapters help with all of this, because you can jump to the source and check.

For a step-by-step walkthrough of the summarizing process itself, read how to summarize a YouTube video. For how AI video summaries work in general, see the AI Video Summarizer page.