Audio tool

Convert Opus Files to AC-3 on Your Device

Convert Opus to AC-3 in your browser for multichannel delivery. The source remains on your device throughout local processing.

Route OPUS → AC3

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

Ready

Use upload name

Local conversion competes with other open apps for processor time during this Opus-to-AC-3 job.
High-resolution Opus footage increases conversion time and memory use.
Compare the AC-3 duration with the source before publishing.

AC-3 serves DVD, cinema, and home-theater audio, whereas Opus commonly serves voice chat, streaming, and efficient web audio.
For Opus-to-AC-3 delivery, plan for channel-layout and licensing requirements.
After leaving Opus, the receiving app must support the streams encoded inside AC-3, not only its extension.

Opus to AC-3 taking too long? Reduce other processor activity and leave the page open until completion.
AC-3 converted from Opus not opening? Test a compatible player and inspect the output streams.
If AC-3 is rejected, compare its codec and stream settings with the destination specification.

When does Opus to AC-3 conversion make sense?

It is useful when Opus media created for low-latency delivery must enter a AC-3 system designed for multichannel delivery.

Where is the Opus source processed?

The browser prepares AC-3 from Opus on this device instead of sending the source to a remote conversion server.

How can I approve AC-3 converted from Opus?

Test the AC-3 file in the receiving app and compare duration, channels and loudness with the Opus source.

Quick use cases