Image Watermark
About this tool
Stamp any photo or graphic with a custom text watermark so your work stays credited when it is shared online. Type any label — your name, a copyright line, a website — then fine-tune the font size, pick a color, and slide the opacity down for a subtle see-through mark or up for a bold one. Choose one of nine anchor positions for a single stamp, or switch to tile mode to repeat the text diagonally across the whole image, which makes screenshots much harder to crop or steal.
Everything is drawn onto an HTML canvas directly in your browser and the result is exported with canvas.toBlob — your image is never uploaded to any server, so private and confidential pictures stay on your device. Files up to 20 MB are supported and the watermarked image downloads as a PNG that preserves transparency.