Free online Opus Audio to AAC Audio converter. Files are processed locally in your browser — no uploads, 100% private.
Drop your .OPUS file here
or click to browse from your device
100% browser-based — no server uploads, no cloud processing
Free forever — no account, credit card, or subscription required
Works on any device — desktop, tablet, and mobile
Results available in seconds — no server queue or wait time
Files cleared immediately after processing — maximum privacy
Modern low-latency codec by Xiph — best quality-to-size ratio
Advanced Audio Coding — successor to MP3 at lower bitrates
This direction is useful when a delivery system, editing application, document workflow, or archive expects AAC instead of OPUS. It can also help prepare a file for a different compatibility or publishing requirement.
The source format is decoded and written as AAC. The result can differ in compression, metadata, layout, color, codec, or other format-specific details, so inspect the output before using it in a final workflow.
The practical result depends on the formats and the source file. Raster images may change in compression or transparency; media may change in codec or bitrate; documents may change in layout or fonts. Keep the original when those details matter.
Lossy formats permanently discard audio data
Uncompressed formats produce impractically large files
DRM restrictions may limit playback in some players
Music streaming and podcast distribution
Ringtones, alerts, and notification sounds
Video soundtrack and background music delivery
High-quality archiving and master backups
Always start from the highest-quality source: lossless to lossy, never lossy to lossy
For streaming, target -14 LUFS (Spotify) or -16 LUFS (podcasts) for consistent loudness
Sample rate and bit depth matter more than codec choice at equivalent bitrates
Preview converted audio before distribution to catch artifacts early
Add the source file and review the selected OPUS to AAC operation.
Start the conversion, then check the resulting AAC file against the original.
Download or continue with the converted file only after the important details look correct.
Yes. This page is for the registered OPUS-to-AAC direction. The available result still depends on the contents and features of the source file.
Check the properties that matter to your workflow, such as quality, transparency, pages, layout, duration, audio, metadata, or compatibility with the application that will open the AAC file.
Not necessarily. Format conversion can change features that the target format represents differently, so retain the original and review the converted file before publishing or sharing.
Use a readable source file, confirm that the selected direction is correct, and decide in advance which visual, structural, or media properties must be verified in the AAC output.
Free, instant, and 100% private. Your files are processed locally in your browser.