CONVERT FLAC → AIFF (FLAC to AIFF)
Fast, secure FLAC to AIFF conversion. No registration required.
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HOW TO CONVERT FLAC → AIFF
Give us the FLAC
Select a FLAC (or several for batch). We read the header to pick decoder settings automatically.
Re-encode to AIFF
The audio is decoded, optionally resampled, and re-encoded as AIFF at transparent default bitrate.
Retrieve your AIFF
Grab the download as soon as it is ready. Typical jobs finish in seconds for short clips.
FLAC is the Free Lossless Audio Codec, offering 40–60% compression with zero quality loss. That is why users land on this page looking for a AIFF copy. Moving audio from FLAC into AIFF is a routine job for podcasters, musicians, transcribers and anyone who needs a file to play somewhere the original would not. KaijuConverter reads the FLAC once, re-encodes through FFmpeg at the bitrate you choose, and returns a polished AIFF in seconds. One more beat. FLAC is the Free Lossless Audio Codec, offering 40–60% compression with zero quality loss. Receiving format: AIFF is Apple's uncompressed Audio Interchange File Format, the macOS equivalent of WAV.
Why convert FLAC to AIFF
The motivation for a FLAC → AIFF conversion is almost always practical: a playback device, hosting platform or editing suite that insists on AIFF. The audio quality trade-off is controllable via bitrate; the compatibility win is immediate and unambiguous.
FLAC vs AIFF — Technical specifications
Side-by-side comparison of the technical details.
FLAC
- MIME type
- audio/flac
- Extension
- .flac
- Standard
- Open-source reference implementation (Xiph.Org)
- Max bit depth
- 32 bits per sample
- Max sample rate
- 655 350 Hz
- Max channels
- 8
- MIME Type
- audio/flac
- Category
- Audio Files
- Full Name
- FLAC Audio
- Conversion Engine
- FFMPEG
AIFF
- Extension
- .aiff
- Max bit depth
- 32 bits (PCM or float)
- Max sample rate
- 192 kHz (practical); unlimited (spec)
- MIME Type
- audio/aiff
- Category
- Audio Files
- Full Name
- AIFF Audio
- Conversion Engine
- FFMPEG
- MIME types
- audio/aiff, audio/x-aiff
- Extensions
- .aif, .aiff, .aifc
- Byte order
- Big-endian
| Specification | FLAC | AIFF |
|---|---|---|
| MIME type | audio/flac | — |
| Extension | .flac | .aiff |
| Standard | Open-source reference implementation (Xiph.Org) | — |
| Max bit depth | 32 bits per sample | 32 bits (PCM or float) |
| Max sample rate | 655 350 Hz | 192 kHz (practical); unlimited (spec) |
| Max channels | 8 | — |
| MIME Type | audio/flac | audio/aiff |
| Category | Audio Files | Audio Files |
| Full Name | FLAC Audio | AIFF Audio |
| Conversion Engine | FFMPEG | FFMPEG |
| MIME types | — | audio/aiff, audio/x-aiff |
| Extensions | — | .aif, .aiff, .aifc |
| Byte order | — | Big-endian |
FLAC vs AIFF — Strengths and limitations
What each format does best, and where it falls short.
FLAC Strengths
- Lossless — decoded audio is bit-exact identical to the source.
- 40-60% smaller than uncompressed WAV/AIFF.
- Free, patent-free, open-source reference implementation.
- Built-in error detection via MD5 checksums.
- Streaming-friendly — seek tables let you jump to any timestamp instantly.
Limitations
- File sizes still large compared to lossy codecs (5-10× bigger than AAC for same audio).
- Not suitable for low-bandwidth scenarios like streaming on mobile data.
- Older MP3 players and car stereos may not decode FLAC.
AIFF Strengths
- Lossless and uncompressed — bit-exact audio reproduction.
- Native to macOS and all Apple Pro Audio apps.
- Simple structure — trivially parsed by audio libraries.
- Supports up to 32-bit float, 192 kHz, and multi-channel audio.
- Rich metadata via named chunks (annotations, markers, MIDI).
Limitations
- Enormous file sizes — 10 MB per minute at CD quality.
- No built-in compression — use FLAC for lossless with smaller files.
- Big-endian byte order confuses tools written on little-endian hardware.
Quality & Compatibility
The AIFF output is as good as the FLAC source allows. If the FLAC was encoded at 96 kbps, the AIFF cannot reconstruct detail the encoder already dropped; picking a very high AIFF bitrate just produces a larger file. Match AIFF bitrate to the FLAC quality for the best balance.
Tips for Best Results
- Sample-rate mismatches between FLAC and target device (48 kHz phone output from a 44.1 kHz track) are handled automatically; no manual resampling needed.
- For audiobook delivery, match the platform spec exactly — ACX requires 192 kbps CBR 44.1 kHz stereo, for example.
- Batch-convert an album in one job so every track shares identical encoder settings and loudness normalisation.
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for AIFF and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the FLAC container to the AIFF container automatically where both formats support them. If a tag field has no AIFF equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
FLAC Audio
Source formatFLAC is an open-source lossless audio codec that compresses audio to roughly 50-60% of its original size without any quality loss. It is the preferred format for audiophiles and music archival.
AIFF Audio
Target formatAIFF is Apple's uncompressed audio format, equivalent to WAV in the macOS ecosystem. It stores CD-quality PCM audio and is widely used in professional audio production on Apple hardware.
Going the other way? Convert AIFF back to FLAC with the same engine.
Common Use Cases
Share across platforms
Send AIFF files to anyone without worrying about whether they have the right software for FLAC.
Embed in documents
Drop AIFF output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
AIFF often produces smaller files than FLAC for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
FLAC vs AIFF — Typical file sizes
Approximate file sizes for common scenarios.
- 3-min song (CD quality) 20-30 MB
- Full album (10 tracks, CD) 250-400 MB
- 3-min song (hi-res 24-bit/96 kHz) 80-120 MB
- 3-min song (CD quality) 30 MB
- 3-min song (24-bit / 96 kHz) 100 MB
- Full album (CD, 10 tracks) 450 MB
Lossless 24-bit Hi-Res Audio or Full Discographies?
Converting pristine FLAC/ALAC collections while preserving 192kHz master dynamics without exhausting mobile bandwidth? Dedicated multi-threaded workstation converters handle entire folders instantly.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Lossless batch chain processing preserving full ID3v2 metadata tags and embedded artwork.
Multi-CPU discography conversion with AccurateRip CRC verification and DSP mastering.
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
FLAC: The Complete Guide to Free Lossless Audio Codec
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Read guide →AIFF Format: The Complete Guide to Audio Interchange File Format
Everything about AIFF: IFF chunk structure, PCM audio data, AIFF vs AIFF-C vs WAV vs FLAC, Apple ecosystem use, sample rates, bit depth, and how to convert...
Read guide →FLAC Lossless Audio Format: Complete Guide to Free Lossless Audio Codec
Everything about FLAC: how Free Lossless Audio Codec works, compression levels, metadata support, bit depths, and how to convert FLAC to MP3, AAC, or WAV.
Read guide →
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