How do I convert AIFF to FLAC?

Add your AIFF file to the upload area above, then press Convert. The FLAC file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to FLAC reduce quality?

No. FLAC is a lossless format, so the conversion preserves exactly what is in your AIFF file. Note that it cannot recover detail that was already discarded when the AIFF was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 300 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

AudioLosslessRuns in your browser

AIFF to FLAC Converter

Turn AIFF files into FLAC in a couple of clicks. Apple's uncompressed audio counterpart to WAV. Lossless compression — CD quality at roughly half the size. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

AIFF files (.aiff, .aif, .aifc) · up to 300 MB each

or paste files from your clipboard

Ready when you are

Drop a AIFF file above and FileTools360 will turn it into FLAC — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your AIFF files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control bitrate, sample rate and channels and start and end times.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

AIFF and FLAC explained

AIFF is Apple's uncompressed audio format, functionally equivalent to WAV but with better metadata support and big-endian byte order.

FLAC compresses audio losslessly, typically to about half the size of WAV. Decompressed, it is bit-for-bit identical to the original — the compression is mathematical, not perceptual.

Where AIFF files come from: Mac audio production and older Apple software.
Where FLAC is used: Hi-fi music libraries and archival rips of physical media.

AIFF vs FLAC

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

AIFF compared with FLAC
Property	Source	Target
Compression	Uncompressed	Lossless
Introduced	1988	2001
Browser support	Strong on Apple, decent elsewhere.	Great on desktop and Android; iOS support is newer.

AIFF is stronger at: Uncompressed and lossless. Better metadata handling than WAV. Standard in Mac audio workflows.
FLAC is stronger at: Lossless — provably identical to the source. Roughly half the size of WAV. Rich metadata and cover art support.

Why convert AIFF to FLAC?

People make this switch when they run into the limits of AIFF: distribution, or interchange with Windows tools where WAV is safer. FLAC is the better fit when archiving music you may want to re-encode later, or storing CD rips.

There is also a size argument: AIFF stores data with little or no compression, so the FLAC version is normally dramatically smaller for the same content.

AIFF limitations that prompt the switch: Very large files. Less universally supported than WAV.
What you give up: Much larger than MP3 or AAC. Not supported natively by all portable devices.

Does converting AIFF to FLAC reduce quality?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.