Bulk AAC to AIFF Converter Online — Free HD Quality
Drag and drop your multiple AAC files into this 100% free online AAC to AIFF converter (.aac to .aiff), and click the Convert button to bulk convert them to AIFF format in HD quality. Use the quality slider to fine-tune your AIFF output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original AAC files are removed from our servers right after. Also see:Transform MP3 to M4R.
Drop your AAC files here to convert to AIFF, or click to browse
Converts .aac to AIFF (.aiff) in HD quality — bulk, free, no signup
Choose FilesAAC vs AIFF — File Format Comparison
See how AAC and AIFF compare across file extension, MIME type, compression, and feature support. Related:Free AAC to AMR - no account needed.
| Feature | AAC | AIFF |
|---|---|---|
| File Extension | .aac | .aiff |
| MIME Type | audio/aac | audio/aiff |
| Compression Type | Lossy | Lossless |
| Metadata Support | Yes | Yes |
What Is AAC Format?
Advanced Audio Coding — the successor to MP3 adopted by Apple, YouTube, and mobile platforms; delivers better quality than MP3 at the same bitrate, especially below 128 kbps. See also:OGG to AIFF conversion tool online.
- Compression: Lossy
- Tags & Metadata: Supported
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