Convert MP3 to AAC — Free, No Upload
Runs entirely in your browser. Nothing is sent to any server.
Audio
Why convert MP3 to AAC?
MP3 and AAC are both widely used formats. Converting between them in your browser is instant, free, and private — no account needed, and your file never leaves your device.
What is MP3?
MP3 is the universal audio format — small file size, compatible with every device and app on the planet.
What is AAC?
AAC (Advanced Audio Coding) is the standard audio format for Apple devices and streaming. Higher quality than MP3 at the same bitrate.
Frequently asked questions
Is this MP3 to AAC converter really free?
Yes, completely free. No account, no credit card, no watermark, no file size limit imposed by a paywall. Convifi is free to use forever.
Is my file safe when I convert MP3 to AAC?
Your file never leaves your device. All conversion happens locally in your browser using WebAssembly. There is no upload to any server — not even Convifi's.
Does this work on iPhone, Mac, and Windows?
Yes. Because it runs in the browser, it works on any device — iPhone, Android, Mac, Windows, or Linux — as long as you have a modern browser like Chrome, Safari, Firefox, or Edge.
How long does MP3 to AAC conversion take?
Conversion time depends on your file size and device. Most files convert in under 30 seconds. Longer videos or high-resolution images may take a minute or two. Nothing is being sent over the network, so your connection speed has no effect.