AAC vs Opus

AAC vs Opus: Established standard vs next-gen codec. Opus offers better quality at all bitrates but has limited device support.

Quick Compress
Choose a file, pick how small it should be, and compress locally.
%

Percentage is applied to the original file size.

Detailed Comparison

CategoryAACOpusWinner
QualityExcellent at 128kbps+Excellent at all bitrates, better at lowOpus
Low Bitrate PerformanceGood down to 96kbpsExcellent down to 32kbpsOpus
CompatibilityUniversalModern browsers, limited devicesAAC
LicensingPatent-protectedRoyalty-free, open sourceOpus
MP4 SupportNative standardNot supported in MP4AAC

Head-to-Head Comparison

  • Quality: AAC - Excellent at 128kbps+ | Opus - Excellent at all bitrates, better at low
  • Low Bitrate Performance: AAC - Good down to 96kbps | Opus - Excellent down to 32kbps
  • Compatibility: AAC - Universal | Opus - Modern browsers, limited devices
  • Licensing: AAC - Patent-protected | Opus - Royalty-free, open source
  • MP4 Support: AAC - Native standard | Opus - Not supported in MP4

Which Should You Choose?

  • Use AAC for MP4 video and maximum compatibility
  • Use Opus for WebM video and web streaming
  • Choose Opus for VoIP and real-time audio
  • Use AAC for social media and mobile devices

The Verdict

Opus is generally better for most users, but both have their place depending on your needs.

Frequently Asked Questions

Which is better: AAC or Opus?

Opus is generally better for most users, but AAC has advantages in specific scenarios. Use AAC for MP4 video and maximum compatibility.

What's the main difference between AAC and Opus?

The key differences are: Quality - AAC: Excellent at 128kbps+, Opus: Excellent at all bitrates, better at low; Low Bitrate Performance - AAC: Good down to 96kbps, Opus: Excellent down to 32kbps.

Can I convert between AAC and Opus?

Yes! Upload your video in either format, select the output format you want, and compress. The conversion happens locally in your browser with no uploads.

Which should I use for quality?

For quality: Opus is better. Excellent at all bitrates, better at low.

Related Comparisons

Opus vs VorbisAAC vs MP3Opus vs MP3