YouTube Chapter Generator — From URL, Transcript, or SRT

A free YouTube chapter generator that handles three inputs: a YouTube URL (it fetches the transcript automatically), an SRT/VTT subtitle file, or a raw timestamp list. It validates the rules YouTube silently enforces — chapters must start at 0:00, you need at least three of them, and they must be 10+ seconds apart — so you don't paste a list into your description and wonder why nothing shows up. Output is formatted ready to paste, with sensible chapter titles auto-generated from transcript content. Runs in your browser, unlimited use, no signup. Built for podcasters, educators, long-form creators, and anyone who's lost watch time to a missing chapter strip.