MP3 to AAC Converter
Convert MP3 to AAC. Batch-ready, stays in your browser.
Drop files here
or click to browse · paste from clipboard
Accepts .MP3 · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Click Convert
Everything runs in your browser via WebAssembly. MP3 to AAC Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
AAC is the default audio format for Apple devices and generally produces better quality than MP3 at the same file size. If you're importing audio into an Apple ecosystem tool, adding sound to a video project, or need audio that plays natively on iOS without additional codecs, AAC is the right choice.
No. MP3 is lossy, so quality reduction from the original encoding is permanent. Converting to AAC re-encodes the already-compressed audio — the output quality matches the MP3 source, not the original recording. For archiving, keep your source files.
192 kbps — a solid balance between file size and audio quality for most content. This produces files roughly 40% smaller than a 320 kbps MP3 at comparable perceptual quality.
Yes. Drop as many as you need. Each file converts separately in your browser, and the results download as a ZIP.
Never. Conversion runs entirely in your browser using WebAssembly. Your files do not leave your device.