Convert MP3 to M4A

Convert MP3 audio to M4A online in a few seconds, with automatic file deletion. Free, fast and without an account.

Your file is deleted automatically after conversion.

How to convert MP3 to M4A

M4A (AAC) is the native audio format of Apple devices and iTunes, with better quality than MP3 at the same bitrate. The MP3 is converted with FFmpeg, the industry-standard media engine, on our server and deleted immediately afterwards.

Step 1: Choose your MP3 file
Drag and drop a .mp3 file onto the converter or click to browse. It works on desktop, tablet and phone.
Step 2: Convert to M4A
The file is converted by FFmpeg on a secure server.
Step 3: Download the M4A
Save the M4A file to your device. You can start again with another file right away.

Why use this MP3 to M4A converter?

M4A (AAC) is the native audio format of Apple devices and iTunes, with better quality than MP3 at the same bitrate.
Keeps the original sample rate and stereo channels.
No watermark, no length limit within the file size cap.
Files are deleted automatically after conversion.

Is it free?

Yes. Converting MP3 to M4A is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device. This server-based conversion accepts files up to 50 MB.

Is my file uploaded?

This conversion needs a server engine, so the file is uploaded over an encrypted HTTPS connection, converted in an isolated temporary folder and deleted automatically as soon as the result is sent back. Nothing is kept, logged or shared.

About the formats

What is MP3?

MP3 (MPEG-1 Audio Layer III) is a lossy audio format developed largely at the Fraunhofer Institute and standardised by MPEG in the early 1990s. It removes sounds that human hearing is unlikely to notice, shrinking files dramatically. Quality depends on the bitrate: higher bitrates sound closer to the original. Its patents have expired and virtually every player, car stereo and browser supports it.

Use MP3 when compatibility is the priority: podcasts, music for older devices, audio for websites or files you send to anyone. For archiving or editing, keep a lossless original such as WAV or FLAC, because each lossy re-encode adds artefacts.

MP3 (MPEG-1 Audio Layer III)

What is M4A?

M4A is an MPEG-4 file that contains only audio; the extension simply tells players there is no video inside. The sound is usually compressed with AAC (lossy) or ALAC, Apple Lossless. It was popularised by iTunes and is the format of iTunes Store purchases, Apple voice memos and many audiobooks and podcasts.

Use M4A for music and recordings in the Apple ecosystem, where it offers better quality than MP3 at the same bitrate. If you need to play the file on older players or systems with limited support, MP3 remains the most compatible option.

M4A (MPEG-4 audio)

Frequently Asked Questions

Is MP3 to M4A conversion free?

Yes. It is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device. This server-based conversion accepts files up to 50 MB.

Will the M4A sound the same as the MP3?

At the default bitrate the difference is inaudible for most people. Choose a higher bitrate if you plan to edit or archive the audio.

Are tags such as title and artist kept?

Common tags are copied when the source contains them.

Is it safe to convert mp3 to m4a here?

Yes. The upload is encrypted, the file lives only in a temporary folder during conversion and it is deleted automatically afterwards. We do not read, keep or share your files.

Do I need to install anything?

No. Everything runs in a modern browser (Chrome, Edge, Firefox or Safari) on Windows, macOS, Linux, Android and iOS. There is no app, plugin or account.

Can I convert M4A back to MP3?

Yes, there is a dedicated M4A to MP3 converter linked in the related tools below. Keep in mind that information dropped in one direction cannot always be restored in the other.

Need the opposite? Convert M4A to MP3

AudioProcessed locally