YouTube MP3 Converter Online 作者： Paul

Local YouTube MP3 Converter turns the audio from a YouTube watch or Shorts page into an MP3 file on your computer. Conversion runs locally in Firefox with bundled FFmpeg WebAssembly. Media is not uploaded to a conversion server operated by the developer.

HOW TO USE
1. Open a YouTube video or Short.
2. Accept the personal-use disclaimer the first time (toolbar popup or on-page prompt).
3. Click the red MP3 button, then Convert to MP3.
4. Choose where to save the file when Firefox asks.

Regular videos are captured from the player (the page may seek briefly). Shorts typically convert from the audio stream. The first conversion may take longer while FFmpeg.wasm loads.

PRIVACY
• No developer-operated conversion backend
• No account required
• Disclaimer acceptance is stored only in local extension storage
• This add-on does not collect or transmit personal data to the developer

PERSONAL USE ONLY
This add-on is not affiliated with, endorsed by, or sponsored by YouTube, Google LLC, or their affiliates.

Videos, audio, artwork, and other YouTube content are owned by Google and/or the respective rights holders. Using this add-on does not give you any ownership rights.

By using this add-on you agree that you will:
• use it only for personal, non-commercial purposes
• convert only content you own or otherwise have a lawful right to convert
• not redistribute, share, sell, or upload files created with this add-on
• comply with YouTube’s Terms of Service and copyright law that applies to you

If you do not agree, do not use this add-on.

REQUIREMENTS
Firefox 140 or later (Firefox for Android 142 or later).