Image Watermark ImageOverlay a logo or image watermark on top of another image with opacity and position controls.

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Image Watermark Image

Overlay a logo or image watermark on top of another image with opacity and position controls.

How to Use

Upload Both Images

Upload your main image and the watermark image (logo, stamp, etc.).

Adjust Settings

Control the watermark opacity, scale, and position on the main image.

Apply and Download

Click Apply Watermark, preview the result, and download.

What Is Image Watermark Image?

An image watermark overlay tool lets you place a logo, stamp, or any image on top of another image as a watermark. Control the opacity from 5% to 100%, the scale from 5% to 100% of the main image width, and the position with five placement options. This is the professional way to brand and protect your photos. Upload your transparent PNG logo and apply it to any photo. Both images are processed entirely in your browser.

Why Use Our Image Watermark Image?

Use your actual logo or custom graphic as watermark
Adjustable opacity and scale for perfect placement
Five position presets: corners and center
Dual image upload with individual change options

Common Use Cases

Professional Photography

Apply your studio logo to all client preview images.

Brand Consistency

Add your company logo watermark to product photos.

Stock Photo Protection

Overlay a watermark on stock photos to prevent unauthorized use.

Document Stamping

Apply stamps like CONFIDENTIAL, APPROVED, or certification marks.

Technical Guide

Image watermarking draws the watermark image on top of the main image using the Canvas API. Both images are loaded as Image elements. The main image is drawn first at full dimensions. The watermark display width is calculated as a percentage of the main image width, with height proportionally calculated. Position is determined by predefined offsets with padding. The watermark is drawn with ctx.globalAlpha set for transparency control.

Tips & Best Practices

1
Use a transparent PNG for your watermark logo for best results
2
Scale of 20-30% works well for most watermark sizes
3
Opacity of 30-60% makes the watermark visible without being overbearing
4
Bottom-right position is the most common for professional watermarks

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Frequently Asked Questions

QWhat format should my watermark be?

PNG with transparent background works best. JPG watermarks will have a colored background box.

QCan I use the same watermark on multiple images?

Currently this processes one main image at a time. Upload each separately with the same watermark.

QHow large should my watermark image be?

Any size works — the scale slider adjusts it. At least 500px wide ensures good quality at larger scales.

QWill the watermark be permanent?

Yes, the watermark is burned into the output image and cannot be easily removed.

QCan I use this for batch watermarking?

This tool processes one image at a time.

About Image Watermark Image

Image Watermark Image is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.