Step 1: Supply your AIFF files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted FLAC files.
AIFF to FLAC Conversion FAQ
Will the FLAC file be much larger than the source AIFF?
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Yes — lossless audio is typically 5-10x larger than lossy audio at perceptually equivalent quality. Plan for ~10 MB per minute for FLAC versus ~1 MB per minute for high-bitrate AIFF.
What output quality should I expect from AIFF to FLAC?
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Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Is AIFF to FLAC genuinely lossless?
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Yes. Both formats keep every sample, so decoding the FLAC returns a bit-identical copy of the audio inside the AIFF. Nothing is quantised, nothing is discarded, and the conversion can be repeated indefinitely without accumulating artefacts. What changes is the file size and which software will open it. AIFF stores uncompressed big-endian PCM — the Apple-side equivalent of WAV, with the same bit-for-bit fidelity. FLAC uses linear prediction plus Rice coding to reach roughly 50-60% of the original size while decoding back to bit-identical PCM.
What exactly is a FLAC file?
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A container with the audio inside it, rather than the audio on its own. That extra layer is where the length, the seek index and whatever metadata the format defines are kept, so a player knows how long a FLAC is before decoding a single frame instead of scanning the whole file to find out. It also means the extension does not always settle what is inside: several containers of this kind are allowed to hold more than one sort of audio, which is why two FLAC files can behave differently while looking identical from outside.
Is AIFF on its way out?
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It is being quietly succeeded rather than switched off. Everything that plays it today will keep playing it — formats do not stop working — but new encoders and new hardware increasingly default to its replacement, so the real question is whether these files have to open on something bought ten years from now. For anything shared or published, converting is cheap insurance. For a personal library that already plays fine, leaving it alone is a defensible answer. AIFF is as large as WAV with worse support outside the Apple world, so it is a poor choice for distribution.
Is AIFF free to use and distribute?
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Yes, without conditions worth worrying about. The specification is public, anyone can implement an encoder or decoder without asking or paying, and nobody can change those terms later — which is why it turns up in open-source tooling, in game engines and anywhere a licence negotiation would have killed the project. Converting away from it does not undo that; the files you already have stay exactly as usable as they were.
Is there a file-size limit when converting AIFF to FLAC?
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Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I batch-convert several AIFF files to FLAC at once?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
What happens to my AIFF files after the conversion?
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Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
What apps can play a FLAC file?
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FLAC plays in most music players, browsers, and media libraries. iTunes / Apple Music, VLC, Foobar2000, and phone media apps handle it natively.
Do I need to install software to convert AIFF to FLAC?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert AIFF to FLAC?
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Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
