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Bethemesh
Images & graphics

Image comparator

Upload two images and inspect visual differences locally with side-by-side or overlay comparison.

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Customize the result, check the live preview, then copy the code.

Preview

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Responsive and automatically resized by Bethemesh.

  • 100% local
  • Instant
  • Free
  • No account
  • Works offline

Your files are processed locally in your browser and are never sent to our servers.

First image

Drop your file here

Recommended size: up to 25 MB

Second image

Drop your file here

Recommended size: up to 25 MB

Comparison mode

Add two images to start comparing.

Why use this tool?

Compare two images directly in your browser with a before/after slider or a side-by-side view, without uploading either file.

100% local and secure

Your data stays on your device and is never sent to our servers.

Smart processing

Prepare and transform images directly in your browser without additional software.

Supported formats

Common image formats with export options provided by the tool.

Save time

Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.

Fonctionnement

How does this tool work?

The comparator loads both images locally and displays them inside one comparison area. In before/after mode, a vertical divider controlled by an invisible range input progressively reveals either image, making it easy to inspect compression, editing, or rendering changes. Side-by-side mode shows both files at once for a broader visual review, and neither image is sent to a server during the process.

Use cases

Compare compression

Check whether an optimized image preserves enough detail compared with the original before you publish or deliver it.

Review an edit

Inspect differences before and after retouching, cropping, color correction, resizing, or another image-processing step.

Validate a revision

Compare two versions of a mockup, screenshot, render, or graphic to spot visual changes quickly and consistently.

Guide

How to use this tool

  1. 1

    Add both images

    Load a first image and then a second image from your device.

  2. 2

    Choose a mode

    Use the overlay slider or the side-by-side view depending on what you need to inspect.

  3. 3

    Inspect details

    Move the divider or review both panels to identify the visual differences.

Tips and best practices

  • Use images with similar dimensions and framing when possible for a more meaningful comparison.
  • The before/after slider is especially useful for compression, retouching, and version checks.
  • Both files remain local in your browser and are never uploaded to Bethemesh servers.

Frequently asked questions

Are the images uploaded?

No. Both files are read and displayed locally in your browser and are not sent to Bethemesh servers.

Can I compare different formats?

Yes. Different image formats can be compared as long as your browser is able to decode and display them.

Do both images need the same size?

No. Different dimensions are supported, although similar size and framing usually make visual comparison easier.

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