AIFF to FLAC — Format Comparison & Online Converter
Fast, instant AIFF to FLAC conversion. No signup required. Just drop your .aiff file and get .flac in seconds.
Batch Settings
Some metadata may not survive
Your AIFF file may contain ID3v2, AIFF chunks metadata. FLAC has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
AIFF形式は、Apple製品で長年親しまれてきた高品質な非圧縮オーディオフォーマットです。しかし、より汎用性が高く、ファイルサイズを抑えながらも音質を損なわないFLAC形式への変換を検討される方も多いのではないでしょうか。特に、限られたストレージ環境や、異なるデバイス間でのスムーズな共有を考える際、FLACはその真価を発揮します。このページでは、大切な音源を最適な形で未来に残すため、AIFFファイルをFLACへと変換する手順を分かりやすくご案内します。音の細部までこだわりたい方、効率的なデータ管理を目指す方にとって、きっとお役に立てるはずです。
- 同人音楽の配布
- ビジネス会議録の長期保存
- 朗読コンテンツの提供
日本のオーディオ愛好家やクリエイターの間では、音質の劣化を極力避けつつ、ファイル容量を効率的に管理するニーズが高く、AIFFからFLACへの変換は特に注目されています。
About AIFF to FLAC Conversion
AIFF (introduced 1988) and FLAC (introduced 2001) are both audio formats, but they differ in important ways. AIFF is Apple's uncompressed audio format — equivalent to WAV in quality. FLAC is lossless audio compression — bit-for-bit identical to the original at roughly 50-70% of WAV size.
Full Name: AIFF uses Audio Interchange File Format, while FLAC uses Free Lossless Audio Codec. Compression: AIFF uses None (uncompressed), while FLAC uses Lossless. Typical File Size: AIFF uses 10 MB per minute at 44.1 kHz/16-bit stereo, while FLAC uses 5–7 MB per minute (50–70% of WAV).
When you convert AIFF to FLAC, the goal is to convert between formats quickly. Converting AIFF to FLAC maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your AIFF file is decoded and re-encoded as FLAC. The conversion involves 4 steps: (1) your aiff file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in flac format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you specifically need a FLAC file for your workflow. For the opposite direction, CocoConvert also supports FLAC to AIFF conversion.
How to Convert AIFF to FLAC
- 1
Upload .aiff file
Select your AIFF file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .flac
Set FLAC as the output format. The converter uses optimal settings based on the AIFF→FLAC conversion profile.
- 3
Convert
The server-side engine decodes your AIFF file and re-encodes it as FLAC. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .flac file. Multiple output files can be downloaded together.
What Happens When You Convert AIFF to FLAC
Your AIFF audio is decoded into raw PCM samples, then re-encoded as FLAC. No audio quality is lost in this conversion.
Your AIFF file is decoded — compressed audio becomes raw PCM waveform data
The raw audio is re-encoded using Free Lossless Audio Codec's lossless codec
Metadata (tags, artwork, track info) is transferred where FLAC supports it
The FLAC file is saved and ready for download
AIFF vs FLAC — Detailed Comparison
| Feature | .AIFF | .FLAC |
|---|---|---|
| Full Name | Audio Interchange File Format | Free Lossless Audio Codec |
| Compression | None (uncompressed) | Lossless |
| Typical File Size | 10 MB per minute at 44.1 kHz/16-bit stereo | 5–7 MB per minute (50–70% of WAV) |
| Platform Support | Very Wide | Very Wide |
| Browser Support | Limited | Limited |
| Year Created | 1988 | 2001 |
| Open Standard | No | Yes |
Should You Convert AIFF to FLAC?
When to Convert
- ✓When you specifically need a FLAC file for your workflow
Frequently Asked Questions
What is the difference between AIFF and FLAC?
AIFF is Apple's uncompressed audio format — equivalent to WAV in quality. FLAC is lossless audio compression — bit-for-bit identical to the original at roughly 50-70% of WAV size. Full Name: AIFF uses Audio Interchange File Format, while FLAC uses Free Lossless Audio Codec. Compression: AIFF uses None (uncompressed), while FLAC uses Lossless. Typical File Size: AIFF uses 10 MB per minute at 44.1 kHz/16-bit stereo, while FLAC uses 5–7 MB per minute (50–70% of WAV).
Does AIFF to FLAC conversion affect quality?
Converting AIFF to FLAC maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, AIFF or FLAC?
AIFF uses none compression. FLAC uses lossless compression. The better choice depends on whether you prioritize file size or quality.
How long does AIFF to FLAC conversion take?
Most conversions finish in seconds. Larger files or complex audio content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is AIFF or FLAC better for long-term storage?
FLAC is better for archival since it preserves all original data.
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