Putting one image on top of another is one of the most fundamental image editing operations. It's how logos get placed on photos, how watermarks protect images, how product mockups are created, and how creative composites come together.
Yet for many people, this simple task is a barrier — it seems to require Photoshop or layer-based editing knowledge. It doesn't. This guide shows you how to overlay images step by step, explains the layer concept in simple terms, and walks through creative uses you can try today.
The Layer Concept (Simplified)
Think of image layers like transparent sheets stacked on a table:
- Bottom layer = your base image (the background photo)
- Top layer = the image you're placing on top (logo, subject, overlay graphic)
Where the top layer has content (pixels), it covers the bottom layer. Where the top layer is transparent, the bottom layer shows through.
That's it. Layers are just images stacked on top of each other, with transparency determining what shows.
Opacity: Controlling How "See-Through" a Layer Is
Every layer has an opacity setting from 0% to 100%:
- 100% opacity — the top layer is fully visible, completely covering the area beneath it
- 50% opacity — the top layer is semi-transparent, and both layers are visible through each other
- 0% opacity — the top layer is invisible
Adjusting opacity lets you create subtle overlays (watermarks, texture effects) or bold placements (logos, subjects).
Step-by-Step: Overlay Images with BestPNG
BestPNG's overlay tool makes it easy to put one image on top of another.
How to do it:
- Open bestpng.com/tools/overlay
- Upload your base image (this will be the background)
- Upload your overlay image (this will go on top)
- Position the overlay by dragging it to the desired location
- Adjust opacity using the slider (100% for a solid overlay, lower for transparency)
- Resize the overlay if it's too large or small
- Preview and download the combined result
The entire process runs in your browser with no server upload.
Getting Your Overlay Ready
The most common issue with overlays is the background of the overlay image. If your overlay has a white or colored background instead of transparency, it will cover the base image with a rectangle instead of just the subject.
Remove the Background First
If your overlay image (logo, subject, graphic) has a background:
- Run it through BestPNG's background remover
- Download the transparent PNG result
- Use that transparent PNG as your overlay
This keeps only the actual content of the overlay appears on the base image.
Save Overlays as PNG
PNG supports transparency. JPG does not. Always prepare overlay images in PNG format. If you have a JPG overlay, the entire rectangular image will cover the base — there's no transparency to show through.
Creative Uses
Product Mockups
Show your product in a real-world context without a photo shoot:
- Find or create a background scene (office desk, living room, outdoor setting)
- Remove the background from your product photo
- Overlay the product onto the scene
- Adjust position and size for a natural placement
Product mockups are used extensively in e-commerce, presentations, and marketing materials.
Double Exposure Effect
The double exposure technique creates an artistic blend of two images:
- Start with a portrait or silhouette as the base image
- Choose a texture, landscape, or pattern as the overlay
- Set the overlay opacity to 40-60%
- The result creates an ethereal, artistic blend of both images
This works best with high-contrast silhouettes as the base and colorful/textured images as the overlay.
Social Media Branded Graphics
Create consistent branded content:
- Start with your content image (photo, screenshot, illustration)
- Overlay your brand elements (logo, frame, text graphic)
- Use consistent positioning and opacity for brand recognition
- Download and post
Before/After Preview
Show the effect of your product or service:
- Use the "after" image as the base
- Overlay the "before" image at partial opacity
- The viewer sees both states simultaneously
Or overlay a dividing line graphic on a combined before/after image for a cleaner presentation.
Photo Compositing
Create scenes that don't exist in real life:
- Start with a background scene
- Remove backgrounds from multiple subject photos
- Overlay each subject onto the scene
- Adjust sizes and positions to create a convincing composite
This technique creates marketing imagery, creative art, and social media content.
Texture Overlay
Add visual texture to a flat image:
- Start with your clean photo as the base
- Choose a texture image (paper grain, film grain, light leaks, bokeh, scratches)
- Overlay the texture at low opacity (10-30%)
- The texture adds visual interest and a vintage or artistic feel
Positioning Tips
Rule of Thirds for Overlay Placement
Just like in photography composition, overlay placement benefits from the rule of thirds. Place logos, watermarks, or subjects at intersection points rather than dead center for a more balanced composition.
Corner Placement for Watermarks
Standard watermark positions:
| Position | Best For |
|---|---|
| Bottom-right | Photos, social media content |
| Bottom-left | Alternative to bottom-right |
| Center | Maximum protection (harder to crop out) |
| Tiled (repeating) | Stock photography, high-protection needs |
Centering for Hero Graphics
For marketing hero images, featured product shots, and profile-style images, center the overlay for maximum impact.
Common Overlay Mistakes
Using JPG Overlays
A JPG logo will have a white rectangle behind it, covering the base image. Always use PNG with transparency.
Over-Scaling
Scaling up a small overlay makes it pixelated. Use the highest resolution version of your overlay image available. If your logo is 200x200 pixels, don't scale it to 1000x1000 — it will look terrible.
Ignoring Contrast
A light overlay on a light base disappears. A dark overlay on a dark base is invisible. Ensure sufficient contrast, or add a subtle shadow or background to the overlay element.
Inconsistent Sizing
If you're overlaying logos on multiple product photos, keep the logo the same relative size on each. Inconsistency looks unprofessional.
Frequently Asked Questions
Can I overlay a transparent PNG on a photo?
Yes — that's exactly what overlay tools are designed for. A transparent PNG will show only the visible content (logo, subject, graphic) on top of the base photo. The transparent areas will not cover anything.
How do I make a semi-transparent overlay?
Upload your overlay to BestPNG's overlay tool and reduce the opacity slider below 100%. At 50%, both images will be equally visible. At 20%, the overlay will be subtle and the base will dominate.
Can I combine more than two images?
With most online overlay tools, you combine two images at a time. For more than two, overlay sequentially: combine image A and B, save the result, then overlay image C onto the result, and so on.
What resolution should my overlay image be?
Your overlay should be at least as large as the area it will cover on the base image. If your base is 3000 pixels wide and the overlay should cover about a third of it, the overlay should be at least 1000 pixels wide.
Does overlaying images reduce quality?
The overlay operation itself doesn't reduce quality. Quality loss happens during saving — if you save as JPG, compression reduces quality slightly. Save as PNG for lossless quality.
Conclusion
Putting one image on top of another is a fundamental skill for design, branding, and creative work. The key ingredients are a transparent overlay (PNG format), proper positioning, and appropriate opacity.
BestPNG's overlay tool handles all of this in your browser — upload two images, position, adjust opacity, and download. No Photoshop required.