AIでYouTubeチャプターを自動生成。任意のURLを貼り付けてコピー可能なチャプターマーカーを取得。
The Video Chapter Generator uses AI to automatically create timestamped chapters for any video. Paste a YouTube, Vimeo, or other video URL and receive a complete chapter breakdown in seconds — no manual scrubbing, no guesswork. The tool transcribes the audio, analyzes the structure of the content, and generates accurate chapter titles with precise timestamps ready to paste directly into your YouTube video description. Whether you
The tool first downloads the video's audio using yt-dlp, then transcribes it using OpenAI Whisper — the most accurate open-source speech recognition model available. The full transcript is then sent to GPT-4o, which reads the content and identifies natural topic shifts, section introductions, and content boundaries to create meaningful chapter titles with accurate timestamps.
The tool supports YouTube (including Shorts and live recordings), Vimeo, and dozens of other platforms powered by yt-dlp — including Twitter/X, Facebook, Dailymotion, and more. Any publicly accessible video URL is likely to work.
Processing typically takes 30–90 seconds for videos up to 30 minutes. Longer videos take proportionally more time. The live progress bar shows you exactly which stage is in progress — downloading, transcribing, or analyzing.
Each chapter generation costs 5 credits. New users receive 15 free credits when they sign up, which covers 3 free generations. Additional credits can be purchased at any time from the credits page.
Copy the YouTube-format block shown at the bottom of the results, then go to YouTube Studio, open your video, and paste it into the description. Make sure the first chapter starts at 00:00. YouTube will automatically detect the timestamps and activate the chapter feature in the player within a few minutes.
No — the tool works with any publicly accessible video URL, including Vimeo and other platforms. The video doesn't need to be uploaded yet. You can generate chapters before publishing and paste them in when you upload.
Videos with clear verbal transitions, topic introductions, or segment markers produce the most accurate chapters. Content like interviews with distinct question topics, tutorials with step-by-step structure, and podcasts with announced segments tend to generate excellent chapters. Purely visual content with minimal speech may yield fewer or less precise chapters.
Yes. The chapters are plain text — you can adjust any title or timestamp before pasting into YouTube. The AI gives you a strong starting point, but you have full control to rename sections or fine-tune timestamps.
The tool can only access publicly available video audio. Private videos on YouTube or other platforms are not accessible without authentication, so the tool will return an error for those. Unlisted YouTube videos with a direct link may work.
Yes. YouTube chapters add keyword-rich text to your video's metadata and create additional anchor points that appear in Google search results — sometimes allowing individual chapters to rank independently. Chapters also reduce viewer drop-off by letting people find what they want quickly, which positively signals YouTube's algorithm.