ALTools
Extract Audio Stream
Extract the original audio track without converting to MP3. Keeps the original encoding when possible.
How to use this tool — step-by-step guideHow Extracting an Audio Stream Works
Upload a video and pull out just the sound track. ALTools extracts on your device—nothing is uploaded and no account is required.
The browser demuxes the file, locates the audio track, and saves it when stream copy is possible—keeping codecs like AAC in M4A or similar containers. If copy is not supported, it transcodes to a compatible audio format.
Turn talks and interviews into podcasts, save music or voice from screen recordings, archive narration separately, or reuse audio in another project.
Local extraction keeps private conversations and unreleased media on your machine. Re-run with different settings without sending the source video anywhere.
Download an audio file—often AAC in M4A when the source allows—with the original quality preserved when stream copy succeeds.
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Frequently Asked Questions
How is this different from Video to MP3?
Video to MP3 always converts audio to MP3. This tool tries to copy the original audio codec (e.g. AAC → M4A, MP3 → MP3) without re-encoding.
When might the audio be re-encoded?
Files over ~1 GB try a fast direct extraction first. If that fails, audio is converted to AAC (.m4a). Smaller files keep the original encoding when possible.
Are files uploaded?
No. Processing happens entirely on your device.