MP3 audio
A universally supported compressed audio format.
Best for music, podcasts, voice, and compact audio delivery.
MP3 to AAC
Converts MP3 audio to AAC for players and apps that need AAC. Add your files, convert them in one batch, and download each AAC directly.
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How to convert MP3 to AAC
The converter runs in your browser and an isolated processing queue. Nothing to install, and every upload is scanned for malware before it is processed.
- 1Add your MP3 filesDrop MP3 files into the converter or choose them from your device. Guest files can be up to 25 MB each.
- 2Choose AACSet AAC as the output for the whole batch, then change individual files if needed.
- 3Convert and downloadStart the batch and download each AAC directly, or save it to your workspace to get a permanent link.
AAC audio
An efficient compressed audio format used by streaming and mobile platforms.
Best for modern playback and compact high-quality audio.
MP3 to AAC
What to expect from MP3 to AAC
What changes in the file, and what to check before you share the result.
Compressed a second time
MP3 and AAC are both lossy, so converting compresses the audio again. That is fine for compatibility; for the best result, convert from a lossless original when you have one.
Why AAC
AAC is widely used by streaming services and mobile devices.
MP3 to AAC questions
Short answers about limits, privacy, and keeping the converted file.
Is the MP3 to AAC converter free?
Yes. Without an account you can convert up to 10 files a day, 2 at a time, up to 25 MB each. A free account adds monthly conversion credits and larger files.
How long are my files kept?
Guest uploads and results are deleted automatically after 1 hour. Conversions stay temporary when you are signed in too, unless you save a result to your workspace.
Can I get a permanent link to the AAC file?
Yes. Save the result to a SteadyLink workspace and it gets a stable link. If you make a new version later, replace the file and the link stays the same.
Browse by file type
Each category has its own converter, format list, and common routes.
Images
JPG, PNG, WebP, AVIF, GIF, TIFF, BMP, HEIC, ICO, SVG
Documents
DOC, DOCX, ODT, RTF, TXT, HTML, PDF
Spreadsheets
XLS, XLSX, ODS, CSV, PDF
Presentations
PPT, PPTX, ODP, PDF
PDF, DOCX, JPG, PNG, TXT
Audio
MP3, WAV, AAC, FLAC, OGG, M4A, Opus
Video
MP4, WebM, MOV, AVI, MKV, GIF, MP3
Archives
ZIP, TAR, TAR.GZ, 7Z
Ebooks
EPUB, MOBI, AZW3, PDF, TXT
Keep the useful ones.
Conversions remain temporary even when you are signed in, so save a result to your workspace when you want a stable URL and revision history.
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