画像ウォーターマーク
ブラウザ上で画像にテキストまたはロゴの透かしを追加します。無料、高速、プライバシー保護、アップロード不要。
Drop an image here or click to browse
JPG, PNG, WebP supported, handles transparency
Watermarking lets you claim ownership and protect your photos, artwork, and brand assets from unauthorized reuse. Add a discreet text copyright, your logo, or a repeated watermark, then tune the size, position, rotation, and opacity so it is visible enough to deter theft without spoiling the image.
Everything runs entirely in your browser using the HTML Canvas API. Your original image and watermark logo never leave your device, so sensitive and unpublished work stays completely private.