Overlay Images — Superimpose & Layer Photos Online Free

Upload a base image and an overlay. Drag to position, adjust opacity and scale, then download the composite. Free, private, no signup.

Base Image

This sets the canvas size

or drag & drop here

Overlay Image

Drag to position on the base

or drag & drop here

How to Overlay Images

Upload the base image

Click or drag to upload the background image. This will be the bottom layer of your composite.

Upload the overlay image

Add the image you want to superimpose on top. PNG with transparency works best for logos and watermarks.

Position and adjust

Drag the overlay to position it. Use the opacity slider (0-100%) and scale slider (10-200%) to fine-tune the look.

Download the result

Click Download to save the composited image as a high-quality PNG file.

What Is Image Overlay?

Image Overlay is a free online tool that lets you superimpose one image on top of another. Upload a base image and an overlay, then drag the overlay to position it exactly where you want. Adjust opacity and scale for the perfect composite — everything runs in your browser with no server uploads.

Unlike basic image mergers that only place pictures side by side, our overlay tool gives you full control over layering, transparency, and positioning. The real-time preview shows your changes instantly, and the final download preserves full resolution as a PNG file.

Why Overlay Images Online?

Superimposing images is essential for watermarking, branding, photo compositing, and graphic design. Traditional tools like Photoshop require installation, subscriptions, and a learning curve. Our free image overlay tool gives you the core functionality you need — drag-to-position, opacity control, and proportional scaling — without any of that overhead.

Whether you are adding a logo to a product photo, creating a watermarked preview, layering text graphics onto an image, or building a photo montage, the overlay tool handles it in seconds.

Key Features

Drag-to-position — Click and drag the overlay image to place it anywhere on the base image.
Opacity control — Adjust transparency from 0% (invisible) to 100% (fully opaque) with a slider.
Scale control — Resize the overlay from 10% to 200% of its original size while maintaining aspect ratio.
Real-time preview — See the composite result instantly as you adjust settings.
PNG output — The composited image downloads as PNG to preserve any transparency from the overlay.

Popular Use Cases for Image Overlay

Watermarking — Add a semi-transparent logo or text overlay to protect your photos from unauthorized use.
Product branding — Layer your brand logo onto product images for e-commerce listings or marketing materials.
Photo montages — Superimpose one photo onto another to create creative composites and double exposures.
Social media graphics — Add text overlays, badges, or decorative elements to photos before posting.
Presentation slides — Layer diagrams, annotations, or callout graphics onto screenshots and charts.

Image Overlay vs. Image Merge

Merging places images next to each other (side by side or stacked). Overlaying places one image on top of another with adjustable transparency. Use our Image Merger when you want to combine images in a row, column, or grid. Use Image Overlay when you want to layer images with opacity control.

You can also convert images to grayscale or crop images into circles before overlaying them. Explore our other tools: merge JPG files, merge PNG with transparency, or compare photos side by side.

Frequently Asked Questions

How do I overlay one image on another?

Upload a base image and an overlay image. Drag the overlay to position it, adjust opacity and scale, then download the composited result as PNG.

Can I adjust the overlay transparency?

Yes! Use the opacity slider (0-100%) to control how transparent the overlay appears on top of the base image.

Can I resize the overlay?

Yes, the scale slider (10-200%) lets you resize the overlay proportionally. Drag it to position anywhere on the base image.

What format is the output?

The composited image always downloads as PNG to preserve any transparency from the overlay.

Is this free?

100% free, no watermarks, no signup. All processing happens in your browser.

Can I use this to add a watermark to my photos?

Yes, this is perfect for watermarking. Upload your photo as the base, upload your logo as the overlay, reduce the opacity to 20-40%, position it in a corner, and download.

What is the difference between overlay and merge?

Overlay places one image on top of another with adjustable transparency. Merge places images next to each other (side by side or stacked). Use overlay for layering, merge for combining.

Can I overlay images on my phone?

Yes, the image overlay tool works on any device with a modern web browser — iPhone, Android, iPad, or desktop. No app needed.

How do I superimpose two photos online?

Upload your background photo as the base image, then upload the photo you want to superimpose as the overlay. Adjust opacity, scale, and position, then download the composite.

Does the overlay tool support transparent PNGs?

Yes! If your overlay image is a PNG with transparent areas, those areas will remain transparent in the composite. This is ideal for logos, stickers, and design elements.