Convert Audio to MP3

About Convert Audio to MP3

MP3 remains the most universally compatible audio format in existence — every device, every player, every platform accepts it without question, which is exactly why converting an audio file to MP3 is such a common need regardless of what format it started as. This tool decodes essentially any audio format your browser's FFmpeg build supports and re-encodes it as MP3, entirely on your own device.

A real FFmpeg build compiled to WebAssembly handles both the decoding and encoding steps, meaning the source format doesn't need to be specifically supported by this tool in advance — whatever FFmpeg's underlying decoder library can read, this can convert, from common formats like WAV and OGG to less common ones your browser might otherwise struggle to play at all.

The output uses VBR (variable bitrate) quality level 2 — a setting that adapts bitrate to the audio's actual complexity moment to moment, generally producing better quality-per-size than a flat constant bitrate would at a comparable file size.

Because everything runs inside your browser's WebAssembly sandbox rather than a remote server, your audio file — voice recordings, personal music, anything sensitive — never leaves your device during conversion.

How it works

1. Upload your audio file. Any format your browser's FFmpeg build can decode.
2. Conversion runs locally. Audio is decoded and re-encoded as MP3.
3. Download the MP3. A universally playable audio file.