Are my MP3 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 MP3 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 MP3 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.

MP3toAIFF

Convert MP3 to AIFF

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

You can convert MP3 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 MP3 and AIFF are for

The audio format everything plays. Lossy, small, thirty years old and still unbeaten on compatibility.

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

How to convert MP3 to AIFF

Drop your MP3 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.

MP3 vs AIFF: what changes

MP3 compared with AIFF
	MP3	AIFF
Full name	MPEG Audio Layer III	Audio Interchange File Format
File extension	.mp3	.aiff, .aif
Media type	audio/mpeg	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.

MP3 to AIFF: common questions

Are my MP3 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 MP3 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 MP3 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.