Runs entirely on your local device. Your images never leave your device.
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Yes. Adding watermarks 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 watermark processing happens locally in your browser's memory and is discarded once you close or refresh the tab.
Yes. Choose the Image watermark type and upload your logo or any image. You can adjust its scale, opacity, rotation, and position just like a text watermark.