What happens on your PC
The desktop application opens your selected files, prepares waveforms and previews, and writes the exported audio locally. The cutting and joining workflows do not send those audio files to this website.
Install once, then work with local files
- Download the installer and complete setup. If Microsoft .NET Desktop Runtime 8 x64 is missing, setup can direct you to its official installer.
- Open a locally stored audio file in Cut MP3 or add several files in Join MP3.
- Set the range or order and export to a local destination. An internet connection is not needed for the audio processing itself.
Separate installation from media processing
Downloading the application, installing a missing runtime, visiting this website, or choosing an optional third-party installer offer can use the internet. Those actions are separate from processing your selected audio.
Choose a destination you understand
A folder synchronized by another application may upload files through that application. If you need a purely local working copy, choose an ordinary local folder and review your sync software settings.