Convert VERT runs conversion engines on your device. After the required engine has loaded and been cached, supported conversions can continue without sending source files to a remote conversion service.
Once the converter page is open and its required engine reports ready, you can disconnect the network and keep converting in that open tab. The already-loaded image, audio, or document engine does not need to upload the file you are converting.
Your browser needs a connection on the first visit to download the application and converter engine. Audio conversion uses the copy hosted with this site first and may fetch the FFmpeg core from jsDelivr only when that local copy fails to load.
File names, thumbnail previews, file contents, conversion work, finished downloads, and error logs remain in browser memory or the local browser console. They are not submitted to a Convert VERT upload, analytics, or logging API.