Decode audio with the Web Audio API and export MP3, WAV, or AIFF (plus labeled AAC/FLAC/M4A downloads) without uploading your file — max 50 MB.
WAV and AIFF are written as uncompressed PCM. MP3 is encoded in-browser with LAME (lamejs) at your selected bitrate (128–320 kbps). Selecting AAC, FLAC, or M4A exports PCM audio packaged with that MIME/type label for broad player compatibility — it is not a full native AAC/FLAC encoder.
Decoding and encoding audio in memory is heavy. The cap reduces the chance of browser out-of-memory errors.
File bytes are processed locally in your browser. The MP3 encoder script is served from ConvertWiseHub’s own static files (same-origin). Your audio content is not uploaded to ConvertWiseHub for conversion.