FLAC to AIFF Converter

Convert FLAC to AIF Online

Turn a FLAC into an Apple-friendly .aif file when a DAW, sampler, or older Mac app demands AIFF but won't read FLAC. Note up front: .aif and .aiff are the same format — Audio Interchange File Format — so this is the identical conversion as FLAC to AIFF, just the shorter three-letter extension that Windows and DOS-era tools tend to write. Because both FLAC and AIF are lossless, the audio is bit-for-bit identical; you gain compatibility, not fidelity, and the file gets bigger.

How to Convert FLAC to AIF

1. Upload Your FLAC File: Drag and drop your .flac files onto the page or click "+ Add Files". You can queue several at once and convert them with the same settings.
2. Set Audio Channel and Audio Sample Rate: Leave Audio Channel and Audio Sample Rate on "Original" for a true 1:1 copy of the source; the output is written as uncompressed big-endian PCM (16-bit by default) inside the AIFF container. Change these only if a device needs mono or a specific rate.
3. Trim (Optional): Use the Trim control to keep just a section of the track; leave it "Unchanged" to convert the whole file.
4. Convert and Download: Click "Convert" and download your .aif. No sign-up, no watermark.

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public.

FLAC vs AIF — What Changes

Frequently Asked Questions

Is .aif the same as .aiff, or do I need to convert between them?

They're the same format. Both are Audio Interchange File Format; .aif is just the three-letter extension that older Windows and DOS systems used, while macOS typically writes .aiff. Pro Tools, Logic Pro, and Ableton read both identically, so switching between .aif and .aiff is usually a rename, not a real conversion. Use this tool when you actually have a FLAC and need an AIFF-family file out the other side.

Will converting FLAC to AIF improve the audio quality?

No. Both formats are lossless and the FLAC already holds the exact original PCM samples. The AIF stores those same samples uncompressed, so the output is identical to the FLAC — you gain compatibility, not fidelity. Anyone promising a quality boost from lossless-to-uncompressed is mistaken; keep your FLAC as the master.

Why is my AIF file so much bigger than the FLAC?

Because you removed the compression. FLAC shrinks audio losslessly — typically to about 50–70% of the uncompressed size — while AIF writes every sample out in full. As a rough guide, CD-quality audio runs around 10 MB per minute of stereo at 16-bit/44.1 kHz, so a FLAC usually expands to roughly 1.5x–2x its original size when converted to AIF. The extra bytes are uncompressed data, not added detail.

Should I use ALAC instead of AIF for Apple devices?

Often, yes. ALAC (Apple Lossless) is also bit-perfect and native to iTunes/Apple Music and Logic Pro, but because it's compressed it's roughly half to two-thirds the size of an AIF of the same audio. Choose AIF when you specifically need an uncompressed master for editing; choose ALAC when you want Apple compatibility without the size penalty.

What bit depth and sample rate will the AIF have?

In our testing, leaving Audio Channel and Audio Sample Rate on "Original" produces an AIF that matches the FLAC's source — most commonly 16-bit or 24-bit PCM at the original sample rate (e.g. 44.1 kHz or 96 kHz), written as big-endian PCM. The converter does not upsample, so a 16-bit/44.1 kHz FLAC yields a 16-bit/44.1 kHz AIF, not a higher-resolution one. If you later want to shrink it back, AIF to FLAC recovers the identical samples at a smaller size, or convert FLAC to MP3 when you just need a compact, shareable file.