MP3 to M4A converter
Free MP3 to M4A converter that runs in your browser. Convert MP3 audio to M4A instantly — no upload, no sign-up, 100% private.
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Convert MP3 audio to M4A right in your browser — no upload, no sign-up, completely free. Drop a file (or a batch) and download the M4A version in seconds. Your audio is processed on your own device and never sent to a server.
MP3 is the most universally compatible audio format. It uses lossy compression to make small files that play on virtually any device, app or website. M4A (AAC in an MP4 container) is the format Apple uses for iTunes and Apple Music. It sounds better than MP3 at the same bitrate and is widely supported on modern devices. Both formats are compressed; converting re-encodes the audio to M4A for better compatibility and a comparable file size.
How to convert MP3 to M4A
- Add your MP3 files. Drag your MP3 audio onto the drop zone or click to browse. You can add several at once.
- Convert. Each track is re-encoded to M4A on your device using your browser’s native audio engine.
- Download your M4A files. Save each file, or grab them all together as a ZIP.
Features
- Private by default. Audio is converted in your browser and never uploaded to any server.
- Batch conversion. Convert many MP3 files to M4A at once and download them as a ZIP.
- Good quality, small files. M4A balances quality and file size for easy sharing.
- Free and unlimited. No watermark, no sign-up, no per-file limits.
When to use it
- Convert MP3 to M4A for a device or app that doesn’t play MP3.
- Make MP3 files smaller and easier to share by converting to M4A.
- Prepare audio for high-quality music on Apple devices and modern players.
- Batch-convert a folder of MP3 files to M4A in one go.
Frequently asked questions
Is this MP3 to M4A converter free?
Yes. It’s completely free with no sign-up, no watermark and no limit on how many files you convert.
Are my files uploaded to a server?
No. Conversion runs entirely in your browser, so your MP3 audio never leaves your device.
Will the audio quality change?
Both formats are compressed; converting re-encodes the audio to M4A for better compatibility and a comparable file size.
What’s the difference between MP3 and M4A?
MP3 is the most universally compatible audio format. It uses lossy compression to make small files that play on virtually any device, app or website. M4A (AAC in an MP4 container) is the format Apple uses for iTunes and Apple Music. It sounds better than MP3 at the same bitrate and is widely supported on modern devices.
Can I convert several MP3 files at once?
Yes. Drop multiple files to convert them as a batch, then download everything as a single ZIP.