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YouTube summarizer even without subtitles

By ShinobiTools Team · Last updated: August 2026

Paste a link and get the gist plus the full transcript. No account, no extension, no sign-up — and it still works when the video has no subtitles at all.

It works on videos the extensions choke on

Almost every YouTube summarizer is a browser extension that reads the subtitle track. That is quick when a subtitle track exists — and it is why they all fail on the same videos: a livestream nobody captioned, a lecture uploaded without subtitles, a video in a language YouTube did not auto-caption.

This does the easy path too: if the video already has subtitles, they are fetched in a second or two and cost nothing. When there are none, the audio is transcribed with Whisper on our own hardware and then summarised. Slower, but it comes back with an answer instead of an error.

The summary is written by an open-source language model running on our own machine, not sent to anyone else's API. You get a short paragraph of what the video is about, the handful of points that actually matter, and who it is for.

You get the transcript as well

A summary is a starting point, not the whole thing. Every run also hands you the complete transcript as a TXT and as subtitles in SRT, so you can search it, quote from it exactly, paste it into your notes or feed it to something else.

There is no account, no e-mail and nothing to install, and the transcript and the summary are both deleted from our server automatically. Nothing is stored, shared or used to train anything.

What it will not do

It reads what is said, not what is shown. A silent screen recording, a music video or a wordless demo has nothing for it to work with, and the summary will be thin or empty — that is not a bug, there is simply no speech in the file.

It also will not invent what it did not hear. If a video mumbles through the important part, the summary says less rather than filling the gap with something plausible. That is deliberate.

Very long recordings are capped for the free summary. Podcasts and lectures of a couple of hours are fine; if you regularly need structured minutes out of multi-hour recordings — decisions, action items, who agreed to what, exported as a Word file — that is what the meeting notes are for.

Common questions

Is this YouTube summarizer free?

Yes. No account, no e-mail, no sign-up and no card. There is a limit on how many summaries one connection can run in an hour, purely so the queue stays usable for everyone.

Can it summarise a video with no subtitles?

Yes, and that is the main reason to use it over a browser extension. Extensions read the subtitle track and fail when there is not one. Here the audio is transcribed with Whisper on our own hardware first, then summarised.

Do I need to install an extension?

No. It is a web page — paste the link and read the answer. It works the same on a phone.

Does it use ChatGPT or Gemini?

No. The summary is written by an open-source model running on our own machine, so your link and the transcript are not handed to a third-party API.

How long can the video be?

Up to a couple of hours for the free summary. Beyond that you will be told, and the paid meeting notes handle the really long recordings.

Can I get the transcript too?

Yes, every run gives you the full transcript as a TXT file and as SRT subtitles, alongside the summary.

Does it work on Shorts and livestream recordings?

Yes for both, as long as there is speech in them. A finished livestream is treated like any other video.

What happens to the video and the transcript?

Nothing is kept. The transcript and the summary are deleted from our server automatically, and neither is shared or used for training.