Convert MP3 files to AAC locally in your browser.
About this tool
Convert MP3 files to AAC locally in your browser. zer.ai keeps the main task close to the top of the page and processes supported content locally in your browser.
Three simple steps
Add a supported file or paste your content.
The tool works locally in your browser when supported.
Save the result directly to your device.
Frequently asked questions
No. This tool processes supported inputs in your browser and does not upload them to zer.ai servers.
No account or registration is required.
Yes on modern mobile browsers, although very large files may exceed the device's available memory.
Some formats, especially HEIC and newer media formats, depend on native browser decoding support.
