Yes. Compressing images on FormatGrid is completely free, with no watermarks, file limits, or account sign-up required.
Nowhere. Your images never leave your device — FormatGrid never uploads, transmits, or stores them on any server. All image compression happens locally in your browser's memory and is discarded once you close or refresh the tab.
Most online image compressors upload your images to a remote server, process them there, then download the result back. FormatGrid performs every step locally on your device's CPU, eliminating upload time, processing queues, and download delays.