Bulk FLAC to AAC Converter Online — Free HD Quality
Drag and drop your multiple FLAC files into this 100% free online FLAC to AAC converter (.flac 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 FLAC files are removed from our servers right after. Also see:Free OPUS to MP3 converter.
Drop your FLAC files here to convert to AAC, or click to browse
Converts .flac to AAC (.aac) in HD quality — bulk, free, no signup
Choose FilesFLAC vs AAC — File Format Comparison
See how FLAC and AAC compare across file extension, MIME type, compression, and feature support. Related:Convert OPUS files in bulk to M4A.
| Feature | FLAC | AAC |
|---|---|---|
| File Extension | .flac | .aac |
| MIME Type | audio/flac | audio/aac |
| Compression Type | Lossless | Lossy |
| Metadata Support | Yes | Yes |
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. See also:Convert WAV files in bulk to OPUS.
- Compression: Lossless
- 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. You might also need:Batch process AAC to AIFC.
- Compression: Lossy
- Tags & Metadata: Supported