Audio extractor & converter - ffmpeg compiled to WebAssembly, runs 100% in your browser (your files are never uploaded).
Extract the audio track from a video (MP4/MOV/MKV → MP3...), or convert recordings and voice memos between MP3, WAV, FLAC, OGG, Opus and M4A.
Honest limits: in-browser conversion is ~10-20x slower than desktop ffmpeg and capped at 500 MB input - fine for audio and short clips, wrong tool for movies.
Choose a file to begin. First use downloads the converter engine (~10 MB, cached after).