Are my AAC files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and convert something. You will see the page load, plus the analytics and advertising the site is paid for with — and nothing carrying your file.

Is converting AAC to AIFF free?

Yes. There is no account, no watermark and no limit on how many files you convert — it runs on your own machine, so it costs us nothing to let you. Files up to 100 MB are handled in the browser.

Does converting AAC to AIFF lose quality?

AIFF is a compressed format, so some data is discarded. At the default setting the difference is not visible; you can raise the quality setting if you need to be certain. The file becomes much larger without becoming better. AIFF stores every sample it is given, but what the original compression discarded is already gone.

Do I need to install anything to open AIFF files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the AIFF afterwards needs whatever software normally handles Audio Interchange File Format on your device.

AACtoAIFF

Convert AAC to AIFF

Up to 100 files at once. Mixed formats are fine.

You can convert AAC to AIFF free and without an account: drop the file above and the AIFF is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What AAC and AIFF are for

The MP3 successor. Better quality per megabyte, standard on Apple devices and in streaming.

Apple's uncompressed audio format. The WAV equivalent on the Mac side.

How to convert AAC to AIFF

Drop your AAC file onto this page, or click to pick one.
Choose AIFF as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished AIFF file.

AAC vs AIFF: what changes

AAC compared with AIFF
	AAC	AIFF
Full name	Advanced Audio Coding	Audio Interchange File Format
File extension	.aac	.aiff, .aif
Media type	audio/aac	audio/aiff
Compression	Lossy — file size is bought with quality	Uncompressed

Quality: Some quality is given up for a smaller file. At the default setting the difference is hard to see.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.
What can be lost: The file becomes much larger without becoming better. AIFF stores every sample it is given, but what the original compression discarded is already gone.

AAC to AIFF: common questions

Are my AAC files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and convert something. You will see the page load, plus the analytics and advertising the site is paid for with — and nothing carrying your file.
Is converting AAC to AIFF free?: Yes. There is no account, no watermark and no limit on how many files you convert — it runs on your own machine, so it costs us nothing to let you. Files up to 100 MB are handled in the browser.
Does converting AAC to AIFF lose quality?: AIFF is a compressed format, so some data is discarded. At the default setting the difference is not visible; you can raise the quality setting if you need to be certain. The file becomes much larger without becoming better. AIFF stores every sample it is given, but what the original compression discarded is already gone.
Do I need to install anything to open AIFF files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the AIFF afterwards needs whatever software normally handles Audio Interchange File Format on your device.