Opus to AAC - Online Audio Converter

Convert Opus to AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert Opus to AAC

[+] Drop Opus audio here or click to select Opus

Output format

AAC (AAC)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About Opus to AAC

Convert Opus to AAC. Opus adapts from 6 kbps speech to 510 kbps music with low latency. AAC is the MPEG-4 successor to MP3 used by YouTube and Apple Music. Container variants (ADTS, MP4) need matching extensions on export..

Why convert Opus to AAC?

Smaller files with AAC lossy compression.
Keep quality where supported.
Private, no upload - runs in your browser.

Opus vs AAC

Codec	Opus	AAC
Compression	lossy	lossy
Sample behavior	Quality set by bitrate	Quality set by bitrate
Typical use	Opus adapts from 6 kbps speech to 510 kbps music with low latency.	AAC is the MPEG-4 successor to MP3 used by YouTube and Apple Music.

When not to convert Opus to AAC

Skip AAC for archival masters: lossy compression discards detail, so keep the Opus original.
Keep a master copy: repeated exports stack small losses, so archive Opus before batch AAC shares.

Limits

Starting point: Opus - Opus adapts from 6 kbps speech to 510 kbps music with low latency. CD-era hardware may not decode it; use MP3 for legacy players. Container variants (ADTS, MP4) need matching extensions on export. Encode AAC (AAC) from Opus at 256k for music or 128k for speech, starting from the master.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert Opus to AAC?

Drop your Opus file onto this page, choose quality and codec settings, then click Convert. The result downloads as AAC instantly. All processing runs in your browser.

What codec is used for AAC?

The default codec for AAC is AAC. You can change audio parameters in Advanced mode.

How do you store my files?

We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.