To compress all output files in a ZIP file, click "" icon on the right, then click "Add to ZIP". To download one single file, simply right-click on file link and click "Save link as...".
|File Name||Original Size||Output Size||Size Compressed||Actions|
Set OPUS audio quality first. OPUS audio quality value can be 1 (lowest audio quality and highest compression) to 100 (best quality but least effective compression). You can also select "Change specified audio parameters" option to set audio bitrate and sample rate. The settings are optional, you can close "Settings" section by clicking the "X" on the right.
You can drag multiple OPUS files to the "Add Files" section. Each file can be up to 200m.
The batch compression automatically starts when files are uploaded. Please be patient while files are uploading or compressing.
The output files will be listed in the "Conversion Results" section. To compress all output files in a ZIP file, click "" icon on the right, then click "Add to ZIP". You can right-click on file name and click "Save link as..." to save the file. The output files will be automatically deleted on our server in two hours, so please download it to your computer or save it to online storage services such as Google Drive or Dropbox as soon as possible.
OPUS is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, 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 embedded processors. Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until transparency is reached, including MP3, AAC, and HE-AAC.
The exclusive "Overall Audio Quality" option on our website is inspired by "JPEG Quality" option in image compression. It's more intuitive than setting audio parameters such as audio bitrate or sample rate etc.