AAC → Opus
AAC to Opus converter
convertexa converts AAC files to Opus locally in your browser using a dedicated ffmpeg engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.
- Free, no sign-up
- Nothing is uploaded
- Works offline
- Quality
- Re-encoded
- Runs
- In your browser
- Max input
- 300 MB
- Status
- stable
Drop a file to convert
Everything happens on your device — nothing is uploaded.
or paste with Ctrl+V
How to convert AAC to Opus
- 1 Drop your AAC file here.
- 2 Choose Opus as the output format and adjust the options.
- 3 Convert and download the result.
About AAC and Opus
AAC is the audio codec used by most streaming services.
Opus gives the best quality per bit for speech and music at low bitrates.
AAC files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.
Limitations
- The conversion runs in your browser, so very large files can exhaust the memory available to the tab.
Frequently asked questions
How do I convert a AAC file to Opus?
Add your AAC file to the box above. convertexa detects the format from the file content, applies the AAC to Opus conversion and gives you the result to download. The whole operation runs inside your browser.
Are my AAC files uploaded anywhere?
No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.
Is the AAC to Opus conversion lossless?
No. Opus is a re-encoded format, so some data is discarded to reach the target format. AAC is the audio codec used by most streaming services.
Is there a size limit?
For reliable results keep the input under 300 MB. Very large files run out of memory in the browser rather than failing quietly.
Which browsers are supported?
Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.