Works with any backend npm install Zero dependencies
Image Watermark

Add a text watermark to every uploaded image, with configurable position and style.

(function() {
    new MultipleUpload('#demo', {
        uploadUrl: '/api/upload',
        multiple: true,
        accept: 'image/*',
        showThumbnails: true,
        watermark: {
            text: 'CONFIDENTIAL',
            fontSize: 32,
            fontFamily: 'Arial',
            color: 'rgba(255,0,0,0.35)',
            position: 'center',
            padding: 20
        }
    });
})();