OPUS to AAC Converter

Select files for conversion or just drag and drop them to the upload area

How to convert OPUS files to AAC online?

Step 1.

Upload OPUS-file

Click "Choose File" button to select a opus file on your computer. OPUS file size can be up to 50 Mb.
Step 2.

Convert OPUS to AAC

Click "Convert" button to start conversion.
Step 3.

Download your AAC

Let the file convert and you can download your AAC file right afterwards.

Information about OPUS and AAC file formats

Name OPUS AAC
Full name OPUS - Opus Audio Format AAC - Advanced Audio Coding
File extension .opus .aac
MIME type audio/opus audio/aac
Developed by IETF codec working group Bell Labs, Fraunhofer Institute etc.
Type of format Audio Audio compression format
Description Opus is a lossy audio coding format developed by Xiph and standardized by the IETF, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low end ARM3 processors. Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications.
Technical details Opus supports constant and variable bitrate encoding from 6 kbit/s to 510 kbit/s, frame sizes from 2.5 ms to 60 ms, and five sampling rates from 8 kHz (with 4 kHz bandwidth) to 48 kHz (with 20 kHz bandwidth, the human hearing range). An Opus stream can support up to 255 audio channels, and it allows channel coupling between channels in groups of two using mid-side coding. AAC supports inclusion of 48 full-bandwidth audio channels in one stream plus 16 low frequency effects channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128 kbit/s.
Associated programs FFmpeg, AIMP, Amarok, cmus, foobar2000, Mpxplay, MusicBee, SMplayer, VLC media player, Winamp foobar2000, AIMP, DirectShow, QuickTime, VLC media player.
Wiki https://en.wikipedia.org/wiki/Opus_(audio_format) https://en.wikipedia.org/wiki/Advanced_Audio_Coding