Audio converter
Convert MP3, WAV, FLAC, M4A, OGG, Opus and the sound of MP4, MOV or WebM videos to MP3, M4A, Opus, OGG, FLAC or WAV. Many files at once, right in your browser.
MP3 uses the LAME encoder (130 KB, downloaded once).
How it works
- Your browser decodes the WAV file at its own sample rate, so a 44.1 kHz song stays 44.1 kHz. Rare formats such as WMA or AMR go through FFmpeg compiled to WebAssembly.
- MP3 is encoded with LAME, the reference MP3 encoder, at the bitrate you pick.
- Several files are converted one after another and can be downloaded together as a ZIP.
Questions
Are my files uploaded?
No. Decoding and encoding run on this device. Only the encoder code (130 KB for MP3) is downloaded once.
Which MP3 quality should I pick?
192 kbps or VBR V2 sounds the same as the original to almost everyone. Use 320 kbps if a site asks for it, 64 kbps for speech only.
Does converting MP3 to FLAC or WAV improve quality?
No. A lossless file keeps exactly what the MP3 had, it can’t bring back what MP3 removed. It’s useful when an editor or a DJ program needs WAV.