Bulk AC3 to FLAC Converter Online — Free HD Quality
Drag and drop your multiple AC3 files into this 100% free online AC3 to FLAC converter (.ac3 to .flac), and click the Convert button to bulk convert them to FLAC format in HD quality. Use the quality slider to fine-tune your FLAC output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original AC3 files are removed from our servers right after. Also see:Batch process FLAC to ALAC.
Drop your AC3 files here to convert to FLAC, or click to browse
Converts .ac3 to FLAC (.flac) in HD quality — bulk, free, no signup
Choose FilesAC3 vs FLAC — File Format Comparison
See how AC3 and FLAC compare across file extension, MIME type, compression, and feature support. Related:Batch M4B to WAV converter.
| Feature | AC3 | FLAC |
|---|---|---|
| File Extension | .ac3 | .flac |
| MIME Type | audio/ac3 | audio/flac |
| Compression Type | Lossy | Lossless |
| Metadata Support | No | Yes |
What Is AC3 Format?
Dolby Digital AC-3 — Dolby's multi-channel surround sound codec used in DVD, Blu-ray, and broadcast television; commonly encountered when extracting audio tracks from home theatre content. See also:Get AAC from AMR.
- Compression: Lossy
- Tags & Metadata: Not supported
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.
- Compression: Lossless
- Tags & Metadata: Supported