Bulk AIFF to FLAC Converter Online — Free HD Quality
Drag and drop your multiple AIFF files into this free online AIFF to FLAC converter (.aiff to .flac), and click the Convert button to bulk convert them to FLAC format in HD quality. Use the quality slider to fine-tune your FLAC output, then download your converted files one by one or as a single ZIP — your original AIFF files are removed from our servers right after.
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PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more
Max 100MB per file
AIFF vs FLAC — File Format Comparison
| Feature | AIFF | FLAC |
|---|---|---|
| File Extension | .aiff | .flac |
| MIME Type | audio/aiff | audio/flac |
| Compression Type | Lossless | Lossless |
| Metadata Support | Yes | Yes |
What Is AIFF Format?
Audio Interchange File Format — Apple's uncompressed audio standard functionally equivalent to WAV but preferred in professional Apple audio workflows and GarageBand projects.
- Compression: Lossless
- Tags & Metadata: Supported
What Is FLAC Format?
Free Lossless Audio Codec — open-source lossless compression that reduces file size by 40–60% versus WAV with zero quality loss, perfect for audiophile archiving.
- Compression: Lossless
- Tags & Metadata: Supported
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