Convert AAC to WAV Online

"Online converter" normally means uploading your file to someone's server, waiting in a queue, and downloading the result. This page inverts that: it loads FFmpeg compiled to WebAssembly into your browser and does the work on your own machine. You keep the convenience of online — nothing to install, works on any OS — without the upload.

The file gets bigger — roughly 8× — because WAV stores about 10 MB per minute against AAC's 1.2. For a working file that's irrelevant. That matters here, because transfer is where server-based converters spend most of their time. With no upload and no download of the result, what's left is just the conversion itself: usually a second or two.

AAC files typically come from HLS streaming segments, broadcast pipelines, Android recording apps, and hardware recorders — and a bare .aac stream lacks the container index that tells software its duration, so players won't list it and editors import it wrong. AAC is lossy, and the detail its encoder discarded is gone permanently — converting to WAV cannot restore it. What you gain is that nothing you do afterwards costs any further quality.

Because it's a web page rather than software, the same converter runs on Windows, macOS, Linux, ChromeOS, iPhone, and Android — with nothing to keep updated and none of the bundled adware that comes with downloadable free converters.

AAC files come from HLS streaming segments, broadcast pipelines, Android recording apps, and hardware recorders. A bare .aac stream lacks the container index that tells software its duration, so players won't list it and editors import it wrong — which is the whole reason this conversion exists. WAV is the destination when you need uncompressed, edit-ready audio that every DAW and editor accepts. The file gets bigger — roughly 8× — because WAV stores about 10 MB per minute against AAC's 1.2. For a working file that's irrelevant. One honest note on this exact pair: AAC is already lossy, so moving to WAV cannot restore detail the AAC encoder discarded — it hands you an uncompressed container, not better audio, and the value is a loss-free chain from here on.