MP3 to AAC Converter
Convert MP3 audio to AAC for free. Choose the bitrate, sample rate and channels, or trim your audio.
or drop files here
Up to 1 GB per file · Files never leave your device
- 100% free
- No sign-up
- No upload — private
- No watermark
How to convert MP3 to AAC
Add your MP3 files
Click “Choose Files” or drag and drop your MP3 audios onto this page.
AAC is selected
The output is already set to AAC. Open Advanced settings if you want to change the bitrate or trim the audio.
Convert and download
Click Convert. Your AAC file is ready in moments — nothing is uploaded.
About the formats
MPEG Audio Layer III
MP3 is the most compatible audio format in the world. It plays on every device and gives small files with good sound quality.
Advanced Audio Coding
AAC is the audio codec used by YouTube, iPhone and most streaming services. It gives great quality at small file sizes.
Frequently asked questions
How do I convert MP3 to AAC?
Click “Choose Files” and select your MP3 file (or drag it onto the page). AAC is already selected as the output, so just click Convert and download your AAC file when it’s ready.
Which bitrate should I choose?
“Automatic” gives great quality for most music. Use 256–320 kbps for the best sound, or 96–128 kbps for voice recordings and podcasts.
Is it safe to convert MP3 files here?
Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.
Is the MP3 to AAC converter free?
Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.
Can I convert several MP3 files at once?
Yes. Add as many MP3 files as you like and convert them in one go, then download them one by one or together as a ZIP file.