Bulk AAC to M4A Converter Online — Free HD Quality
Drag and drop your multiple AAC files into this 100% free online AAC to M4A converter (.aac to .m4a), and click the Convert button to bulk convert them to M4A format in HD quality. Use the quality slider to fine-tune your M4A 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:How to convert M4A to WAV online?.
Drop your AAC files here to convert to M4A, or click to browse
Converts .aac to M4A (.m4a) in HD quality — bulk, free, no signup
Choose FilesAAC vs M4A — File Format Comparison
See how AAC and M4A compare across file extension, MIME type, compression, and feature support. Related:Switch M4R to MP3 format.
| Feature | AAC | M4A |
|---|---|---|
| File Extension | .aac | .m4a |
| 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. See also:How to convert WAV to AAC?.
- Compression: Lossy
- Tags & Metadata: Supported
What Is M4A Format?
MPEG-4 Audio — AAC audio in an MP4 container, the standard format for Apple Music, iTunes purchases, and iPhone voice memos, offering better quality than MP3 at equivalent bitrates. You might also need:How to convert FLAC to OGA online?.
- Compression: Lossy
- Tags & Metadata: Supported