Bulk M4A to AAC Converter Online — Free HD Quality
Drag and drop your multiple M4A files into this 100% free online M4A to AAC converter (.m4a to .aac), and click the Convert button to bulk convert them to AAC format in HD quality. Use the quality slider to fine-tune your AAC output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original M4A files are removed from our servers right after. Also see:Free OPUS to MP3 - no account needed.
Drop your M4A files here to convert to AAC, or click to browse
Converts .m4a to AAC (.aac) in HD quality — bulk, free, no signup
Choose FilesM4A vs AAC — File Format Comparison
See how M4A and AAC compare across file extension, MIME type, compression, and feature support. Related:Mass FLAC to AAC conversion.
| Feature | M4A | AAC |
|---|---|---|
| File Extension | .m4a | .aac |
| MIME Type | audio/mp4 | audio/aac |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | Yes |
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. See also:Convert AIFF to AIFC.
- Compression: Lossy
- Tags & Metadata: Supported
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