Add Watermark to Images — Free
Add text or image watermarks to protect your photos.
200万以上のファイル変換
数千人のユーザーに信頼されています
安全な転送
HTTPS暗号化アップロード
プライバシー優先
処理後にファイルを自動削除
登録不要
すぐに変換を開始
どこでも動作
あらゆるブラウザ、あらゆるデバイス
変換方法
Upload your images.
Add text or image watermark.
Adjust position and opacity.
Download watermarked images.
About Add Watermark to Image
Image watermarking protects your photos from unauthorized use by embedding visible branding or copyright information directly into the image. Whether you're protecting portfolio work, branding client deliverables, or marking preview images, our watermark tool provides professional results with flexible positioning and styling options.
Choose between text watermarks with custom fonts, colors, and styling, or image watermarks using your logo or graphic. Position controls place watermarks in any corner, centered, or at custom coordinates. Opacity settings let you create subtle, professional marks that don't distract from the image content. Tiled mode repeats the watermark across the entire image for maximum protection.
Photographers watermark portfolio images and client proofs to prevent unauthorized use before purchase. Stock photographers mark preview images while keeping high-resolution originals clean. Real estate photographers add agency branding to listing photos. Event photographers watermark online galleries while preparing clean files for print orders. Artists protect digital artwork from theft.
Batch processing applies identical watermarks to multiple images, perfect for photographers processing event galleries or product photographers marking entire catalog shoots. Preview mode shows exactly how the watermark will appear before processing. Settings can be saved for consistent branding across future uploads.
Common Use Cases
- •Protect portfolio images from unauthorized use
- •Brand client deliverables with your logo
- •Mark preview images for stock photography
- •Add copyright notices to published work
- •Create branded social media images
How It Works
Our image watermarker uses Sharp's composite function to blend watermarks onto images. Text watermarks are rendered with custom fonts using SVG text. Image watermarks with alpha channels preserve transparency over the base image.