Convert MP3 to AAC for smaller files and better quality on Apple devices and streaming. Drop a .mp3 file below and the output is already set to AAC.
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Drag and drop your .mp3 file onto the box above, or click Choose Files. The request is already filled in: “Convert this to AAC”.
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The AI assistant uses sensible defaults. To choose the bitrate, codec or sample rate yourself, say so in the request, for example “Convert this to AAC at 320 kbps”.
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The assistant opens with your file and converts it on your own device; the file itself is never uploaded. When the AAC file is ready, click Save. Prefer to set everything by hand, or batch-convert several files into a ZIP? The classic converter is one click away on this page.
AAC achieves the same quality as MP3 at roughly 25% lower bitrate and is the native codec of iPhone, YouTube and most streaming services. Converting MP3 to AAC modernises an old library or prepares audio for platforms that require it.
Because both formats are lossy, a second encode adds a little loss; choose a bitrate equal to or above the MP3's. Everything runs in your browser.
MP3 (MPEG-1 Audio Layer III): MP3 is the universal lossy audio format. It plays on every device made in the last twenty-five years and offers small files with good quality at 192 to 320 kbps. It is best for music players, podcasts, phones and sharing.
AAC (Advanced Audio Coding): AAC (Advanced Audio Coding) is the successor to MP3 and the codec behind M4A, YouTube and most streaming services. A raw .aac file is an AAC stream without an MP4 wrapper. It is best for streaming, YouTube and modern devices.
In short: keep MP3 when the priority is music players, podcasts, phones and sharing, and switch to AAC when the file is headed for streaming, YouTube and modern devices. Need a different target? The full Audio Converter supports every format listed below.
Only if a device or platform requires AAC. Re-encoding lossy audio never improves it; keep the MP3s if they already play where you need them.
Match or exceed the MP3's bitrate: 192 kbps MP3 to 192 kbps AAC, or 320 kbps MP3 to 256 kbps AAC.
Yes. Converting MP3 to AAC on Convertor.video is free, with no watermark and no sign-up. The AI assistant runs on a free daily allowance of assistant credits; the classic converter on this page has no daily limit at all.
No. The conversion runs inside your browser using FFmpeg compiled to WebAssembly, so your .mp3 file is read and converted on your own device and never uploaded, which keeps private recordings private and means there is no waiting in an upload queue. The AI assistant only sees what you type and basic facts about the file: its name, format, duration and size.
There is no plan or account limit, but the converter loads the whole MP3 file into your browser's memory, so about 2 GB per file is the practical ceiling; larger files may fail to open. Long or high-resolution files also take longer, especially on phones.
Yes. Ask the AI assistant for a bitrate, codec or sample rate in your request. Audio track selection and every other setting are in the classic converter, one click away on this page.
AAC is a lossy format, so the MP3 audio is decoded and re-encoded. Keep the bitrate at 100% (or pick 256 to 320 kbps) and the difference is inaudible for almost all listeners.
It is built and tested on current desktop Chrome and Edge. The conversion itself runs in WebAssembly, which every current desktop browser supports, so speed depends mostly on your computer's processor.