YouTube Summary with ChatGPT & Claude

Browser extension that pipes YouTube transcripts, articles, and PDFs into ChatGPT, Claude, Gemini, or Mistral for instant summaries.

Freemium· Free extension; uses your own ChatGPT/Claude/Gemini accountAgentsMulti-model (ChatGPT, Claude, Gemini, Mistral)

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Best for

Pick YouTube Summary with ChatGPT & Claude if you spend a lot of time on YouTube and want a free, one-click way to skim videos through the LLM you already pay for.

Skip if

Skip it if you need API access, batch summarization, or a non-Chromium browser, or if you mostly watch hour-plus videos that overflow chat context limits.

YouTube Summary with ChatGPT & Claude is a Chrome extension from Glasp Inc. that grabs the transcript of whatever YouTube video you're watching and hands it to your LLM of choice for summarization. A side panel surfaces the full transcript with clickable timestamps, and a one-click button opens ChatGPT (or Claude, Gemini, Mistral) prefilled with the transcript and a summary prompt. It also works on web articles and PDFs, making it a general-purpose 'read this for me' utility rather than a YouTube-only trick.

What sets it apart from the dozens of clones is reach and model flexibility: 1M+ installs, a 4.3-star average across nearly 4,000 reviews, and support for all four major chat assistants instead of locking you into one. The extension itself is free; you bring your own ChatGPT/Claude/Gemini account (free tiers work fine), so there is no subscription to summarize a video. Glasp also bundles its own highlighting and note-taking layer for users who want to save quotes across the web.

Caveats: because it pastes the transcript into the chat UI rather than calling an API, very long videos can exceed the model's context window, and the transcript quality depends on YouTube's auto-captions. There is no Firefox/Safari version, and power users who want programmatic access or batch summarization should look elsewhere.

Editor's take

The category is crowded with knock-offs, but Glasp's version is the one that actually keeps shipping and supports more than just ChatGPT. The 'bring your own model' approach means it stays free as the LLM market churns. Not glamorous, but it's the summarizer extension we actually leave installed.

— The AI Tool Bible editorial team