Converter

WAV, MP3, FLAC, OGG and M4A, in batches too.

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How it works

Conversion uses ffmpeg compiled for the browser: the first time it downloads the encoder (32 MB), then it stays cached.
WAV and FLAC are lossless; MP3, OGG and M4A are compressed: 320 kbps is the highest MP3 quality.

Everything happens on this device: no file is uploaded and nothing leaves the browser.