AIFF to FLAC Converter
Convert AIFF files to FLAC format online for free. No installation or registration required.
Quick Answer: How to Convert AIFF to FLAC
AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV. FLAC is the Free Lossless Audio Codec — compresses audio 30–50% with zero quality loss. Converting between them re-encodes the media with FLAC's compression model, so output quality depends on the settings you pick in the converter. Run it free at practicalwebtools.com/convert/audio/aiff-to-flac: drop in your AIFF, adjust settings if you like, and download the FLAC — no signup, no upload, everything stays on your device.
AIFF vs FLAC: Which One and Why
AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV, designed by Apple in 1988 from Electronic Arts' IFF standard. FLAC is the Free Lossless Audio Codec — compresses audio 30–50% with zero quality loss, released open-source by Xiph.Org in 2001. People reach for AIFF mainly for professional music production on macOS, DJ software libraries, sample packs, while FLAC is the usual choice for archiving CD collections, audiophile listening, studio masters distribution. AIFF's headline strength: bit-perfect quality. FLAC's: perfect fidelity — the decoded output is identical to the source. On the other side of the ledger, AIFF limitation: same huge file sizes as WAV — and FLAC limitation: still 4–6× larger than 320 kbps MP3.
How to Convert AIFF to FLAC Online
- 1
Add your AIFF file: Drag and drop it into the converter, or click to browse. AIFF files up to the size limit are accepted, and nothing is uploaded — processing runs locally in your browser.
- 2
Set FLAC options: Pick your quality: the converter exposes the settings that matter for FLAC. Higher bitrates preserve more of the AIFF's detail at larger file sizes.
- 3
Download the FLAC: Conversion runs on your device. When it completes, download the FLAC file — repeat for as many files as you need, free and unlimited.
Key Facts
- AIFF: designed by Apple in 1988 from Electronic Arts' IFF standard, uncompressed PCM — same size as WAV at equal settings.
- FLAC: released open-source by Xiph.Org in 2001, lossless — decompresses bit-for-bit identical to the original.
- AIFF strength: bit-perfect quality.
- FLAC strength: perfect fidelity — the decoded output is identical to the source.
- AIFF limitation to know: same huge file sizes as WAV.
- FLAC limitation to know: still 4–6× larger than 320 kbps MP3.
- Fun fact: FLAC's MD5 checksum of the raw audio lets you verify an archive is still bit-perfect years later — no other common audio format does this
Format Background
AIFF
AIFF — designed by Apple in 1988 from Electronic Arts' IFF standard. AIFF-C (compressed AIFF, the .aifc extension) can hold IMA/SDX2 codecs — rare today, but why some .aifc files are far smaller than expected
FLAC
FLAC — released open-source by Xiph.Org in 2001. FLAC's MD5 checksum of the raw audio lets you verify an archive is still bit-perfect years later — no other common audio format does this
Frequently Asked Questions
Will converting AIFF to FLAC lose quality?
It depends on the formats: AIFF is uncompressed PCM — same size as WAV at equal settings and FLAC is lossless — decompresses bit-for-bit identical to the original. Any step from a lossless source into FLAC keeps everything; any lossy step re-encodes and discards some data.
Are my files uploaded anywhere during AIFF → FLAC conversion?
No. This converter runs on WebAssembly inside your browser — your AIFF file is read from disk, processed by your device's CPU, and the FLAC is written back locally. There is no server upload at any point, which also means no size-based throttling or waiting in queue.
What devices and apps play FLAC files?
native in Android 3.1+, iOS 11+, Windows 10+, and all modern browsers. Still 4–6× larger than 320 kbps MP3 — worth knowing before you standardize on it.
Can I convert several AIFF files at once?
Yes — the converter processes a queue of files in one session, each entirely on your device. Batch mode is handy when moving a library into FLAC; just remember each file re-encodes independently, so set your quality once and it applies to all.
Related Converters
Further reading
Guides and explainers on the Practical Web Tools blog cover audio and video formats in depth — or browse every audio converters pair from the hub.