Convert MP3 to M4A
100% private — runs on your device, never uploaded. Works offline once loaded.
M4A is AAC in an Apple-friendly container, and at any given bitrate it holds up better than MP3 — which is why Apple Music, iTunes purchases and iPhone recordings all use it. Converting an MP3 across makes sense when a device or app specifically wants M4A, or when you want an iPhone ringtone, since those must be AAC. Be clear about what it does not do: re-compressing an MP3 cannot restore what MP3 already discarded, so this is one more generation of loss rather than an upgrade. Use a bitrate at least as high as the source, and go back to a lossless original instead if you still have one.
Frequently asked questions
Does converting MP3 to M4A improve quality?
No. The detail MP3 discarded is gone, and re-encoding costs a little more. Convert from a lossless source if you have one.
Why would I want M4A at all?
Some Apple software and devices ask for it specifically, and an iPhone ringtone has to be AAC rather than MP3.
Is my file uploaded?
No — the conversion happens in your browser.
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