Tracklist & Chapters Maker（トラックリスト作成）

曲名リストや音声ファイルからYouTube用タイムスタンプを自動計算。トラックリストもチャプターも一発生成。端末内処理。

Stop calculating timestamps by hand. Tracklist & Chapters Maker turns a simple song list into a YouTube-ready tracklist with timestamps — the kind you paste into a video description to get chapters. Everything runs on your device. HOW IT WORKS 1. Paste one track per line: "Song title 3:24" (its length) — start times are added up for you. "12:40 Song title" (a start time) works too. 2. Or drop your audio files (MP3 / M4A / WAV / OGG / FLAC) — track lengths are read on your device, never uploaded. 3. Copy the result into your video description. Done. BUILT FOR MUSIC & PODCAST CHANNELS - Reorder tracks with drag & drop or arrow buttons — every timestamp is recalculated instantly - YouTube chapter rules checked automatically (starts at 0:00, 3+ chapters, 10+ seconds each) - Editable heading: pick a language preset, then type your own title (e.g. "Vol.12 Tracklist") - Gap setting for crossfades between tracks - Switches to h:mm:ss automatically for videos over an hour WHAT YOU GET (FREE) - Up to 10 tracks, standard format, one-click copy PRO (ONE-TIME PURCHASE, NO SUBSCRIPTION) - Unlimited tracks - AI title translation into 8 languages (English, Japanese, German, French, Spanish, Italian, Portuguese, Korean) - runs with Chrome's built-in on-device AI, nothing is sent to any server. Perfect for YouTube's per-language translated descriptions. - Numbered & dashed formats - Save as TXT / CSV / JSON files - Headings in 8 languages - Save slots - keep each show's track list and settings under a name PRIVATE BY DESIGN Your track lists and audio files never leave your computer. Audio files are only read for their duration. The only network request this extension makes is verifying your one-time Pro purchase (handled by ExtensionPay + Stripe). Not affiliated with YouTube. YouTube is a trademark of Google LLC.