AAC – Advanced Audio Coding
AAC is a lossy audio codec that usually sounds better than MP3 at the same size. It is used by Apple, YouTube and many streaming services.
More AAC conversionsDrop your AAC files here
or click to choose AAC files · up to 95MB each
How to convert AAC to MP3
- Choose your files. Click Select File or drag your AAC files into the upload box. You can add many at once.
- Pick the settings. MP3 is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
Why convert AAC to MP3?
Raw AAC files, from voice recorders, some phones and downloads, do not play in every car stereo or old MP3 player. MP3 plays everywhere, so converting AAC to MP3 is the safest way to share the audio.
When to keep the AAC
Keep the AAC if it plays fine on your devices; it is often smaller at the same quality.
Tips for the best result
- The MP3 uses high-quality variable bitrate encoding.
- Convert many files at once and download a ZIP.
- Song details such as title, artist and album are usually carried over to the new file.
Common problems and fixes
- The file will not convert.
- Some files named .aac are really another format. Check where the file came from.
- The MP3 is bigger than the AAC.
- AAC is more efficient, so an MP3 of similar quality can be larger.
MP3 – MPEG Audio Layer III
MP3 is the most widely supported lossy audio format. It makes music files small enough to share and plays on virtually every device.
More MP3 conversionsConverting AAC to MP3
- Your AAC file is converted on our server and the MP3 result can be downloaded straight away.
Frequently asked questions
Does AAC to MP3 lose quality?
It re-encodes the sound, which loses a tiny amount. At this quality most people cannot hear it.
Is AAC the same as M4A?
Mostly: M4A is AAC audio inside an MP4 container, while .aac files hold the bare audio stream.
How do I convert AAC to MP3?
Click Select File or drop your AAC file onto the upload box. The converted MP3 appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.