Convert AIFF to FLAC
Free, fast AIFF → FLAC. No watermarks, no sign-up.
How to convert AIFF to FLAC
1. Upload AIFF
Drop your AIFF file into the converter above.
2. Confirm FLAC
Output is already set to FLAC. Adjust only if you need to.
3. Download
Convert and download your FLAC file instantly.
Format Details
AIFF
AIFF (Audio Interchange File Format) is an uncompressed audio container developed by Apple, commonly used in professional music production and macOS workflows. Convert to MP3, WAV, FLAC, and other formats.
audioFLAC
FLAC (Free Lossless Audio Codec) is an open-source audio format that compresses audio without any loss of quality, allowing perfect bit-for-bit reconstruction of the original recording. It typically reduces file sizes by 40-60% compared to uncompressed WAV while remaining completely lossless. FLAC is the format of choice for audiophiles, music archivists, and mastering engineers who require studio-quality audio fidelity in a manageable file size.
audioConverting AIFF to FLAC: what actually changes
AIFF to FLAC is one of the conversions this site performs, but the two formats are not interchangeable containers. Here is what the file keeps, what it loses, and how to get a result you can use.
What .AIFF and .FLAC each hold
.AIFF is a audio format built for listening to or editing a recording, storing sample rate, channels and bitrate. .FLAC is a audio format built for listening to or editing a recording, storing sample rate, channels and bitrate. Converting between them is a decision about which of those two jobs the result needs to do.
What changes in the conversion
Both files belong to the audio category, so this is a like-for-like repackage: the same kind of content, stored in a different container. What changes is how .FLAC encodes sample rate, channels and bitrate — not what the file is about.
Quality and file size
Both .AIFF and .FLAC are lossless, so the content itself survives the trip intact. The main difference is how efficiently each format packages sample rate, channels and bitrate — which is what changes the file size.
When this conversion is the right one
Reach for .FLAC when the software, device or platform you are sending to expects it — the content is the same audio, only the packaging differs. The reverse direction works the same way, so you can always convert back from .FLAC to .AIFF using the same tool.
Tips for a clean AIFF to FLAC conversion
Start from the original file
Convert the .AIFF you started with, not an earlier .FLAC output. Every extra round trip costs quality and can accumulate formatting drift.
Check the real type, not the extension
Audio/aiff becomes audio/flac. If a file was renamed rather than converted, it will fail to open — rename it back to its true extension before uploading and the conversion will recognise it.
Length decides the time
Conversion runs in real terms on duration: a few seconds of media finishes almost at once, while a full-length .AIFF takes noticeably longer. Upload once and let it finish rather than retrying.
Limits worth knowing
Uploads are capped per file (30 MB, or 100 MB for video) and processed temporarily — nothing is kept as a permanent copy. For huge audio files, split or compress the source first.
Frequently Asked Questions
How do I convert AIFF to FLAC?
Upload your AIFF file on Convertek, select FLAC as the output format, then click Convert. Your FLAC file will be ready to download instantly.
Is the AIFF to FLAC converter free?
Yes. Converting AIFF to FLAC on Convertek is completely free with no watermarks. Fair upload limits apply (typically 30 MB per file).
Is my file kept after conversion?
No. Files are processed temporarily and not stored permanently. Converted downloads are available only in your browser session.
What is the difference between AIFF and FLAC?
AIFF and FLAC are different file formats with distinct use cases. Converting between them lets you use your file in software or workflows that require the FLAC format.