How is the opacity controlled?

The tool sets ctx.globalAlpha before drawing the watermark text, blending it with the underlying image. A value of 1.0 is fully opaque; 0.3–0.5 gives a subtle semi-transparent effect.

What positions are available?

Center, bottom-right, and bottom-left. The text is offset a few pixels from the edge in corner positions to ensure it is fully visible.

Can I change the watermark font or color?

The font color defaults to white with a dark shadow for legibility over any image. Font size is adjustable. Custom colors can be added in a future update.

Image Watermark

Add a text watermark to any image with custom position, opacity, and font size.

Upload Image

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FAQ

How is the opacity controlled?: The tool sets ctx.globalAlpha before drawing the watermark text, blending it with the underlying image. A value of 1.0 is fully opaque; 0.3–0.5 gives a subtle semi-transparent effect.
What positions are available?: Center, bottom-right, and bottom-left. The text is offset a few pixels from the edge in corner positions to ensure it is fully visible.
Can I change the watermark font or color?: The font color defaults to white with a dark shadow for legibility over any image. Font size is adjustable. Custom colors can be added in a future update.

The Image Watermark tool renders a text overlay on your uploaded image using the Canvas 2D API. Choose the watermark text, position (center, bottom-right, or bottom-left), font size, and opacity via a slider. The text is drawn with ctx.globalAlpha so it blends naturally with the image. Download the watermarked image as PNG.