ImageToolKit

Add Watermark to Image Online — Free Watermark Maker [2026]

Add text watermarks to any image online. Set watermark text, position, font size, opacity, and color. Real-time preview and instant download. Free browser-based watermark maker — no signup.

🖼️

Drag & drop an image here, or click to browse

Supports JPEG, PNG, WebP, GIF, BMP

What is Image Watermark Adder?

Image Watermark Adder is a free online tool that stamps a text watermark onto any photo or graphic. Watermarks protect your work from unauthorized use, add copyright notices, or brand images before sharing. You have full control over the text, size, placement, transparency, and color — all processed in your browser with no server upload.

How to Use Image Watermark Adder

Upload an image by dragging it into the drop zone or clicking to browse. Type your watermark text in the input field. Adjust font size (12–72 px), choose a position (top-left, top-right, center, bottom-left, or bottom-right), set opacity (0–100%), and pick a color (white, black, or custom). The canvas preview updates in real time. Click "Download Watermarked Image" to save the result.

How Image Watermark Adder Works

The tool draws your image onto an HTML5 Canvas element. Watermark text is overlaid using the Canvas 2D fillText() API at your chosen font size and position. The globalAlpha property controls the text opacity, and fillStyle sets the color. Coordinates are calculated based on the selected position preset and adjusted for padding. The final composite is exported as a PNG file for download — all processing runs client-side in your browser.

Common Use Cases

  • Protect portfolio photos from unauthorized downloading and reuse
  • Add copyright notices to images before publishing on social media
  • Brand product photos with your company or store name
  • Mark preview or draft images with "SAMPLE" or "PROOF" text
  • Add photographer credit to shared images and blog posts

Frequently Asked Questions

What positions can I place the watermark?▼

You can place the watermark at the top-left, top-right, center, bottom-left, or bottom-right of the image. Each position includes a 20 px padding from the edge for a clean look.

Can I adjust the watermark transparency?▼

Yes. The opacity slider goes from 0% (fully invisible) to 100% (fully opaque). A setting of 30–50% is typical for a subtle watermark that does not overwhelm the image.

What colors are available for the watermark text?▼

You can choose white, black, or any custom color using the color picker. White or black with 40–60% opacity works well on most images.

Can I use this to add a logo watermark?▼

This tool supports text watermarks only. For image-based logo watermarks, you would need a more advanced image editor.

Does this tool upload my images to a server?▼

No. All processing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device.

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