SpriteSplit
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YouTube Chapters & Description

Drop the video. The speech is recognised on your device, split into chapters with timestamps, and turned into a description draft, title ideas, tags and the transcript.

✓ No upload, 100% private✓ No sign-up✓ Works on phone & desktop
1 Add your video
Drop a video or audio file with speech
Recognised on your device by a small speech model (about 40 MB once). You get chapters with timestamps, the transcript, an SRT and a description draft.
MP4 · MOV · WebM · MP3 · WAV · M4A. Nothing is uploaded.

Missing an option? Suggest an improvement or ask for a new tool.

How to get YouTube chapters from a video

  1. Drop the video or an audio file, or try the sample
  2. Choose the language and how often you want a chapter (every 30 s to 5 min); tap Make chapters
  3. Read the chapters once: the titles come from the words spoken, so fix any odd ones
  4. Copy the chapters into your description (YouTube needs 00:00 first and at least three chapters of 10 s or more)
  5. Copy the description draft, tags and a title idea; download the SRT for captions

How it works

  • On your device: the same small speech model as the Auto Subtitles tool (Whisper tiny, about 40 MB once). Your video never leaves the phone.
  • Chapters start at pauses in the speech, close to the spacing you chose; each title is taken from the first meaningful words of that part.
  • Titles, description and tags are built from the most frequent words, with templates: a starting point to edit, not a magic answer.
  • Long videos: a 10-minute video takes a few minutes on a phone; a laptop is faster.

Frequently asked questions

Quick answers about the chapters & description (on-device ai) tool.

Is the video uploaded?

No. Audio is read in your browser and the model runs there too.

Which languages?

English works best; Hindi, Telugu, Tamil, Spanish, French, German, Portuguese, Indonesian and Arabic with lower accuracy.

Why do some chapter titles look odd?

They are the first words of that part. Rename them in the text before posting; the timestamps are the hard part and those are right.

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Make chapters