Bulk AAC to iPhone Audio Converter Online — Free HD Quality
Drag and drop your multiple AAC files into this free online AAC to iPhone Audio converter (.aac to .iphone), and click the Convert button to bulk convert them to iPhone Audio format in HD quality. Use the quality slider to fine-tune your iPhone Audio output, then download your converted files one by one or as a single ZIP — your original AAC 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
AAC vs iPhone Audio — File Format Comparison
| Feature | AAC | iPhone Audio |
|---|---|---|
| File Extension | .aac | .iphone |
| MIME Type | audio/aac | audio/mp4 |
| Compression Type | Lossy | Lossy |
| 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.
- Compression: Lossy
- Tags & Metadata: Supported
What Is iPhone Audio Format?
iPhone-optimised Audio — AAC/M4A audio encoded at 256 kbps, 44100 Hz stereo for maximum compatibility with iPhone, producing a .m4a file ready to sync via iTunes or AirDrop.
- Compression: Lossy
- Tags & Metadata: Supported
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