Convert MP3 to M4A for iTunes, Apple Music libraries and iPhone ringtones. Drop a .mp3 file below and the output is already set to M4A.
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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 M4A”.
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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 M4A 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 M4A 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.
M4A (AAC) is Apple's native audio format and the one iTunes and Apple Music prefer for imported songs and ringtones. Converting MP3 to M4A produces a file that syncs cleanly to iPhone, keeps its artwork tags and can be turned into an .m4r ringtone.
AAC is more efficient than MP3, so you can pick a lower bitrate for a smaller file with comparable quality. The conversion is done in your browser without uploading your music.
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.
M4A (MPEG-4 Audio): M4A is audio-only MP4, normally holding AAC (or lossless ALAC). It is the native format of iTunes, Apple Music and iPhone Voice Memos and sounds better than MP3 at the same bitrate. It is best for Apple devices, iTunes and voice memos.
In short: keep MP3 when the priority is music players, podcasts, phones and sharing, and switch to M4A when the file is headed for Apple devices, iTunes and voice memos. Need a different target? The full Audio Converter supports every format listed below.
Yes. Convert to M4A, trim it to under 40 seconds with our cutter, rename the extension to .m4r and add it through Finder or iTunes.
No. Both are lossy; a second encode adds slight loss. Choose 256 kbps AAC to keep it inaudible.
Yes. Converting MP3 to M4A 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.
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.