Free YouTube summarizer with clickable chapter timestamps
Paste a YouTube URL and get a transcript plus a structured summary: an overview, key insights, and a chapter outline where every timestamp is clickable and seeks the in-app player to that exact moment. It's free to start. It even works when a video has no captions: an on-demand AI transcript handles those, which is a credits-billed step (your first 2 are free for life). And on paid plans you can paste a whole playlist or channel URL and import it in batches.
What "with timestamps" should actually mean
Most free summarizers print times next to bullet points. The useful version is a chapter outline you can click to jump the player to 12:43 and watch the thing the summary is talking about. YouTube Collector builds that outline and wires each timestamp to the player, so the summary and the video stay in sync while you read.
How it compares
| Feature | YouTube Collector | NotebookLM | BibiGPT |
|---|---|---|---|
| Jump-to-moment chapter timestamps that seek the player | Yes | No, navigate via inline citations, not a clickable chapter outline | Yes |
| Works without existing captions | Yes, an on-demand AI transcript (credits-billed) when captions are missing | No, reportedly relies on existing YouTube captions rather than transcribing the audio | Yes, extracts the audio transcript |
| Whole-playlist or channel import | Yes, one paste then imports in batches (paid plans) | No, add source URLs individually | Not advertised |
| Repurpose into a blog post, tweet thread, or LinkedIn post | Yes | No | No, appears geared toward exporting notes to Notion/Obsidian rather than drafting posts |
| Searchable community transcript library | Yes | No | No |
| Real free tier | Yes | Yes | Yes |
NotebookLM is genuinely good once a video has captions, and it handles long caption imports without a tight length cap. The gap is the navigation: the transcript lands as a block of text you move through with inline citations, not a clickable chapter list that drives a player. BibiGPT is the closest match on the timestamp feature itself, with clickable jumps and direct sync to Notion, Obsidian, and Readwise.
Choose a different tool if
Choose NotebookLM if your videos already have captions and your real goal is to chat with Gemini across that transcript alongside a stack of other documents in one notebook. The Q&A grounding is the draw, and captions-only is fine when your sources already have them.
Choose BibiGPT if your endpoint is a tidy markdown note in Notion or Obsidian, or you summarize Bilibili, podcasts, and other platforms as often as YouTube. It does clickable timestamps and note sync well; it just doesn't carry a searchable shared transcript cache or draft blog and social posts for you.
FAQ
Is it actually free? Yes, there's a free tier you can use without a card. Paid plans exist for heavier volume, and the limits are listed before you sign up.
Does it work on a video with captions turned off? Yes. If YouTube has no caption track, an on-demand AI transcript records the audio itself, so no-caption videos still produce a transcript and chapters. It's a credits-billed step (1 credit per started 10 minutes, and the first 2 are free for life), a long video takes about 2-5 minutes, and videos over 180 minutes aren't supported. Caption-only tools just return an error on no-caption videos.
What about really long lectures or live streams? They work when the captions already exist. If a long video has no captions and needs the AI transcript, that path is capped at 180 minutes, so a multi-hour stream without captions falls outside it. If you're comparing options, summarize.tech is built for long single videos but is reported to cap at roughly four-hour runtimes, so very long streams can fall outside it too.
I've seen cheap paid summarizers like Eightify. Anything to know? Eightify's free trial is limited to a small number of summaries (reported as three) before it asks for payment, and it publishes a 30-day pro-rata money-back policy on its terms page. Worth reading the cancellation and billing terms before you subscribe to any of these.
Can I get the summary out of the app? Yes. Copy the transcript and summary out of the browser and paste it into your notes, or repurpose a video into a blog post, tweet thread, or LinkedIn post from the same screen.
Try it on your next video
Paste a URL, watch the chapters build, and click a timestamp to jump the player. If it saves you the rewind-and-scrub, keep it; if NotebookLM or BibiGPT fits your workflow better, the comparison above should make that clear too.
Spelling note: summariser and summarizer are the same word — US and UK spelling. Whichever way you searched, this page and YouTube Collector cover both.