Image Watermark Adder
Protect your brand and copyright with custom text or logo watermarks. 100% private and secure.
Drop image to Watermark or browse files
Supports JPG, PNG, WEBP (Maximum privacy)
Drag watermark to position
Styling
Processing is 100% local-first
What is Image Watermark Adder
The Image Watermark Adder is a browser-based utility that lets you stamp custom copyright labels or brand logos onto your photos. By drawing text or a secondary image overlay directly onto a HTML5 canvas, the tool embeds your custom watermark into the image data.
This tool functions entirely client-side, meaning your high-resolution original images are processed in your web browser's local sandbox memory. This setup avoids server-side uploads, keeping your designs, sensitive templates, and personal photography confidential.
How to Use Image Watermark Adder
- Upload your base image: Click the primary dotted drag-and-drop box to select an image from your device, or drag a file directly into the drop zone.
- Choose watermark type: Select either the Text tab to input a custom string, or the Logo tab to upload a graphical watermark (such as a PNG logo file).
- Customize your watermark content: Type your copyright statement or company name in the input box, or click the logo upload button to load your brand mark.
- Style the overlay: Adjust the Opacity, Size, and Rotation sliders. You can select a font family (Inter, Arial, Serif, Monospace) and choose a fill color using the color picker for text watermarks.
- Position the watermark: Click and drag the watermark directly over your image on the preview canvas to place it exactly where you want it.
- Save your watermarked image: Click the Download Watermarked Image button to render and download the watermarked file to your computer.
Key Features
- Flexible Text & Image Stamping: Toggle easily between text overlay and logo image upload options.
- Drag-to-Position Control: Drag the watermark around the canvas to place it precisely relative to your image elements.
- Interactive Adjustments: Calibrate watermark opacity, dimensions, and rotation angles in real-time.
- Format-Agnostic Processing: Works with common web file extensions including JPG, PNG, and WebP.
- Secure Sandbox Rendering: Performs all image compositing within your browser's private memory space.
Common Use Cases
- Photographers: Placing copyright signatures or brand logos on high-resolution preview shots before sending them to clients.
- Real Estate Agents: Overlaying agency logos or contact details onto property photos before listing them online.
- E-commerce Stores: Marking product photos with their store name to deter competitors from hotlinking or copying images.
- Graphic Designers: Stamping draft concepts with "SAMPLE" or "CONFIDENTIAL" to protect active work-in-progress drafts.
Privacy & Data Note
All watermarking logic executes directly in your browser. No files, logos, or text assets are uploaded to our servers, assuring complete privacy.
Frequently Asked Questions
No, the tool does not compress your image during editing. The final file is rendered using a high-quality Canvas API export, keeping original details and resolutions sharp.
No. The application runs 100% locally in your web browser's tab. Your images, text inputs, and logos are processed in RAM and never sent to a server.
Yes, uploading a PNG with transparency is the recommended way to add a professional logo watermark, as it blends cleanly without any solid background box.
Use the **Size** slider under the styling controls to scale the text or logo up and down to match the dimensions of your photo.
The canvas boundary clips the drawing. If you drag the watermark off-screen, just click towards the center of the image area to relocate the anchor point.