Bulk OPUS to AAC Converter Online — Free HD Quality
Drag and drop your multiple OPUS files into this free online OPUS to AAC converter (.opus 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 — your original OPUS 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
OPUS vs AAC — File Format Comparison
| Feature | OPUS | AAC |
|---|---|---|
| File Extension | .opus | .aac |
| MIME Type | audio/opus | audio/aac |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | Yes |
What Is OPUS Format?
Opus — the IETF standard for internet voice and music streaming; outperforms MP3, AAC, and Vorbis at every bitrate, and is the default codec for WebRTC, Discord, and Spotify Connect.
- 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
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