Convert MP3 to AAC
Private by design: the conversion runs on your device. Nothing is uploaded.
- Choose the target format
- Drop your file (or click to browse)
- Download the converted file
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Output format: aac
AAC is what Apple hardware, most streaming stacks and every modern video container reach for, and at a given bitrate it is measurably better than MP3. Converting an ageing MP3 is worth doing when the audio is heading into a video edit or an iOS project rather than into a music library. The encode happens in this tab through ffmpeg compiled to WebAssembly.
Frequently asked questions
- Does moving from MP3 to AAC improve the sound?
- It cannot. The MP3 already discarded whatever it discarded, and this pass repackages what is left into a more efficient codec.
- Then why do this conversion at all?
- For the destination rather than the fidelity: a video editor, a pipeline that only ingests AAC, or a device that handles AAC natively and stutters on anything else.
- Will the resulting file be smaller?
- At the bitrate used here it lands close to the original and sometimes a little under. The advantage shows up when you deliberately choose a low bitrate, where AAC holds together better than MP3.