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AAC to MP3 Converter

Drop a AAC file, choose your MP3 bitrate, download. The conversion runs entirely in your browser - nothing uploads, nothing is stored, and large files convert as fast as your machine allows.

Drop a AAC file here, or click to choose

Converted locally in your browser - nothing is uploaded

Why convert AAC to MP3?

Raw AAC streams and .aac files confuse many players even though the codec itself is excellent. Repackaged as MP3 they play everywhere. All conversion happens in your browser with the Web Audio API and a pure-JavaScript MP3 encoder - files never upload, there are no size limits beyond your device, and the page works offline once loaded. Need to shorten the file first? The audio trimmer cuts before you convert; the volume normalizer levels the loudness; and the converter hub handles every other direction.

FAQ

Is the conversion really done in my browser?

Yes - the file is decoded with the Web Audio API and re-encoded to MP3 by a JavaScript port of the LAME encoder, all on your device. Nothing uploads, which is why there is no queue, no file-size cap, and no privacy question.

What MP3 quality should I choose?

192 kbps is the sweet spot for most uses - transparent to most listeners at half the size of 320. Choose 320 kbps for archiving or critical listening, 128 kbps for voice recordings and minimum size.

Does converting reduce audio quality?

Converting to MP3 is lossy: it discards data the encoder judges inaudible. At 192-320 kbps the difference from the source is inaudible to most people on most material. Converting lossy-to-lossy (e.g. OGG to MP3) stacks two generations of loss - fine for convenience, avoid for masters.

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