Convert MP3 to AAC

Convert MP3 audio to AAC 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 AAC

AAC is the codec behind YouTube, iPhone and most streaming services, efficient and widely supported. 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 AAC
The file is converted by FFmpeg on a secure server.
Step 3: Download the AAC
Save the AAC file to your device. You can start again with another file right away.

Why use this MP3 to AAC converter?

AAC is the codec behind YouTube, iPhone and most streaming services, efficient and widely supported.
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 AAC 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 AAC?

AAC (Advanced Audio Coding) is a lossy audio codec standardised by MPEG as part of MPEG-2 and MPEG-4, and designed to succeed MP3. At the same bitrate it generally sounds better than MP3. It is the standard audio codec in MP4 videos and is widely used by Apple, YouTube and digital broadcasting. A .aac file is a raw AAC stream, while .m4a wraps the same audio in an MPEG-4 container.

Use AAC for music, podcasts and audio tracks where you want good quality in small files, especially for Apple devices, smartphones and streaming. If a file must play on very old hardware, MP3 is more universal; for archiving, keep a lossless copy.

AAC (Advanced Audio Coding)

Frequently Asked Questions

Is MP3 to AAC 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 AAC 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 aac 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 AAC back to MP3?

Yes, there is a dedicated AAC 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 AAC to MP3

AudioProcessed locally