Why this tool is useful
Save the audible part of a short owned video as a compact MP3 for listening, transcription preparation or editing.
Local File Tools · runs locally
Private Video to MP3 Audio Extractor
Decode the audio track of a short browser-playable video and encode it as MP3 without uploading the clip.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy. No server copy is created, stored or left to delete. The file picker is cleared when processing starts, and disposable worker memory is destroyed after completion or cancellation. Preview and generated-output memory is released when you clear the tool or leave the page.
How it works
Web Audio decodes the media locally, bounded PCM samples are mapped to mono or stereo, and the pinned unmodified lamejs encoder writes MP3 bytes in this tab.
Practical example
Select a short WebM or MP4 with audio, encode its track as 128 kbps MP3 and verify the local output before download.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.