Audio Converter

How it works

This tool decodes your audio file into raw samples using your browser's built-in Web Audio engine — the same decoder used to play audio in the browser itself, which handles MP3, WAV, OGG, M4A and FLAC — then re-encodes those samples into your chosen output format. WAV needs no encoder at all (it's just the raw samples with a small header), so it always works; M4A uses your browser's built-in AAC encoder when available.

Limitations

Output formats are WAV and M4A only — no MP3 (no cleanly-licensed encoder exists) and no OGG output yet (a real Ogg container is a different binary format from MP4/M4A and hasn't been built here yet, though it's on the roadmap). Input decoding is much broader than output encoding, since it relies on your browser's built-in decoder rather than anything this tool has to implement itself.

FAQ

Can I convert to MP3?

No — see this site's other audio tools for the full explanation, but in short: every available JavaScript MP3 encoder is either directly LGPL-licensed or wraps LGPL-licensed code under a misleading MIT label, so there's no cleanly-licensed way to produce one here. You can convert to WAV (always works) or M4A (when your browser's built-in encoder supports it).

Can I convert from MP3, OGG or FLAC?

Yes — reading/decoding those formats uses your browser's own built-in audio decoder, which is a completely different capability from encoding, and is broadly supported. Only the output (encoding) side is constrained.

Why is WAV so much bigger than my original file?

WAV stores every sample uncompressed. Any compressed format you started with (MP3, OGG, M4A, FLAC) will produce a larger WAV file when decoded and re-saved — that's expected, not a bug, and it's the tradeoff for a format that needs no encoder at all.

Is there a length or file size limit?

No hard limit is imposed by this tool — you're bounded by your own device's memory, not a server-side quota.