Privacy & terms

Updated September 5, 2026. ChapterPack is an independent HexMobius tool, not affiliated with Yoto.

Your audio stays on your device

Audio processing uses FFmpeg in your browser. We do not upload, store, listen to or distribute your audio. Closing the tab discards the working session. Downloaded files remain on your device.

Optional analytics

With your permission, Google Analytics receives page views and coarse product events: file selection, chapter preparation, preview, successful export and error category. Vercel Web Analytics, when enabled, records page views. We never send audio, filenames, chapter titles or split timestamps. Analytics may process device, approximate region and referrer information. Google Analytics uses cookies. You can change your preference using the button below; declining stops future collection from this site. Hosting infrastructure still receives ordinary network requests and operational logs.

Your responsibility

Use only audio you own or have permission to process. DRM-protected files are not supported. Keep your originals and listen to exports before using them. Device compatibility and acceptance are not guaranteed. This free experimental tool is provided without warranties.

Open-source audio engine

This site distributes the unmodified @ffmpeg/core 0.12.10 WebAssembly engine, licensed under GPL-2.0-or-later, and @ffmpeg/ffmpeg under MIT. FFmpeg is copyright its contributors. Source code, third-party components and build instructions are available from ffmpeg.wasm and FFmpeg. GNU GPL v2 license. Other libraries retain their respective licenses.