Upload an image and add a text or logo watermark. Control position, opacity, size, and rotation. Process multiple images at once.
Watermark Adder is a browser-based tool on 24Toolkit. Upload an image and add a text or logo watermark. Control position, opacity, size, and rotation. Process multiple images at once. Watermark Adder overlays custom text onto your images to protect ownership or add branding. You control the watermark text, font size, position (center or any corner), and opacity level — from a faint background mark to a bold overlay. The tool renders the watermark using the Canvas API directly in your browser, then exports the combined result as a downloadable image. The Canvas API renders text directly onto your image inside the browser, so photos are never uploaded to an external server — safe for sensitive or pre-publication images. Watermark Adder is a browser-based workflow on 24Toolkit at /watermark-adder for users who need fast, private results without installing software. Upload an image and add a text or logo watermark. Control position, opacity, size, and rotation. Process multiple images at once. The page is designed for direct use in
Key Features
Text & image watermarks
Position, rotation & tiling
100% client-side
Custom fonts & colors
Free with no limits
How to Use
Upload your image using the upload area. Drag-and-drop or click to browse for PNG, JPEG, or WebP files.
Type your watermark text and adjust the font size, position (center, top-left, top-right, bottom-left, bottom-right), and opacity slider.
Click Apply Watermark to render the text overlay onto your image. The preview updates to show the final result.
Download the watermarked image. The original file remains unchanged — only the exported version contains the watermark.
FAQ
Can I add an image or logo as a watermark instead of text?
This tool specializes in text watermarks with customizable font size, position, and opacity. For image or logo overlays, use a dedicated image-overlay or compositing tool that supports layering multiple image files.
How do I make the watermark subtle enough not to distract viewers?
Lower the opacity slider to around 20–30 percent for a light, unobtrusive mark. Placing it in a corner rather than the center also reduces visual interference while still deterring unauthorized use.
What image formats and sizes are supported?
The tool accepts PNG, JPEG, and WebP files. Since rendering uses the HTML5 Canvas, performance scales with your device's capabilities — most modern browsers handle images up to several thousand pixels on each side without issues.