What kinds of differences does this tool detect?

It compares file metadata — type, dimensions, resolution, and size — and highlights where the visual content of the two images differs pixel by pixel.

Do the two images need to be the same size?

They don't have to be, but visual comparison is most meaningful when the dimensions match. If the sizes differ, the metadata view still reports the discrepancy clearly.

Which image formats are supported?

Common web formats such as PNG, JPEG, and WebP load fine because the comparison relies on the browser's native image decoding.

Are my images uploaded anywhere?

No. Both images are read and compared locally in your browser, so they are never sent to a server or stored.

Image Diff Checker

Compare two images and analyze their differences in type, size, resolution, and visual content.

Upload Images

Image 1

Drop image here or click to upload

Supports: JPG, PNG, GIF, WebP, SVG, BMP

Image 2

Drop image here or click to upload

Supports: JPG, PNG, GIF, WebP, SVG, BMP

Show Image Metadata

About This Tool

The Image Diff Checker helps you compare two images and analyze their technical differences.

Image Metadata: Compare type, dimensions, aspect ratio, and file size
Side-by-Side View: View images next to each other for easy comparison
Overlay Mode: Overlay images with adjustable opacity
Slider Mode: Use a slider to reveal differences between images
Drag & Drop: Easy upload by dragging images into the tool
Privacy First: All processing happens in your browser, no uploads

About Image Diff Checker

When two images look almost the same, the differences that matter are often invisible to a quick glance: a few pixels shifted, a colour that drifted during export, a resolution that quietly changed, or a file that ballooned in size after a re-save. An image diff checker makes those differences explicit so you can confirm what actually changed between two versions.

This tool loads two images side by side and reports their type, dimensions, resolution, and file size, then highlights where the visual content differs. It's useful for designers verifying that an export matches the source, developers checking that an asset optimisation didn't degrade quality, and QA reviewers confirming a screenshot diff before and after a change.

Both images are processed entirely in your browser. Nothing is uploaded to a server, so you can compare private mockups, screenshots, or product assets without them leaving your machine.

How to use Image Diff Checker

Upload the first image
Select the original or baseline image you want to compare against.
Upload the second image
Add the modified or candidate image. The tool reads both files locally.
Review the metadata
Compare type, dimensions, resolution, and file size between the two images to spot non-visual changes.
Inspect the visual differences
Use the side-by-side and overlay views to see exactly where the pixels differ.

Frequently asked questions

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