Image Compare Slider

Compare two overlaid images easily with intuitive slider controls.

Select first image

Drop file here

Select second image

Drop file here

What is Image Compare Slider?

Image Compare Slider is an advanced online tool that allows you to visually compare two images through intuitive operations by overlaying them and revealing differences.

Beyond simple slider operation, zoom and pan functionality enables detailed verification down to the finest details. From professionals who need precise analysis of web design improvements, photo editing effects, and before-after comparisons, to general users, this comprehensive comparison tool serves a wide range of applications for accurately identifying subtle differences between images.

No software installation required - start using immediately in your browser. Supports high-resolution images and achieves pixel-level precise comparisons.

Features of Image Compare Slider

  • Intuitive Comparison: Easily see differences between two images with a simple slider movement
  • Advanced Zoom & Pan Functionality: Zoom in/out and navigate images for detailed comparison of fine details
  • Direction Options: Compare horizontally (left-right) or vertically (top-bottom)
  • Rich Operation Methods: Support for diverse operations using mouse, keyboard, and wheel
  • Detailed Information: View comprehensive details about each image including file size, resolution, and timestamps
  • Fullscreen Mode: Examine images in greater detail using the fullscreen option
  • Browser-Based: No software installation required, accessible from anywhere

How to Use Image Compare Slider

Basic Operations

  1. Select Images: Upload two images by dragging and dropping into the input boxes or by using the file selector
  2. Choose Direction: Select comparison direction (horizontal or vertical)
  3. Compare with Slider: Move the slider on the displayed images to reveal differences between them
  4. View Details If Needed: Toggle the "Image details" switch to display information about both images
  5. Use Fullscreen: Click the fullscreen button for a larger comparison view

Advanced Operation Methods

Mouse Operations

  • Drag Image Area: Pan (move) the image
  • Drag Slider: Move slider position
  • Ctrl + Wheel: Zoom in and zoom out

Wheel Operations

  • Wheel: Move image vertically
  • Shift + Wheel: Move image horizontally

Keyboard Operations

  • Arrow Keys: Fine-tune slider position
  • 0 Key: Reset zoom and pan

Reset Function

Use the reset button in the top right corner or press the 0 key to restore all display settings (zoom, pan, slider position) to their initial state.

Use Cases

Design & Development

  • Website Redesign Verification: Compare before and after views of website designs
  • UI/UX Change Assessment: Visualize interface adjustments and improvements
  • Responsive Design Testing: Compare screenshots from different device displays
  • Pixel-Perfect Verification: Use zoom functionality to catch even the smallest design element differences

Photo & Image Editing

  • Editing Effect Evaluation: Accurately assess changes made in photo editing
  • Color Correction Comparison: Check differences between various color adjustments or exposure settings
  • Filter Verification: Compare images with different filters applied
  • Detail Change Confirmation: Use zoom functionality to compare small editing areas in detail

Education & Presentation

  • Visualizing Change: Compare landscape or architectural changes over time
  • Before-After Demonstration: Show the impact of renovations or modifications
  • Educational Material: Create visual aids that highlight differences for teaching purposes

Technical Notes

Supported Image Formats

The tool supports a wide range of common image formats:

  • JPEG (.jpg, .jpeg)
  • PNG (.png)
  • GIF (.gif)
  • WebP (.webp)
  • Other browser-supported image formats

Optimal Usage Conditions

  • Matching Resolutions: For best results, both images should have the same resolution (width and height)
  • Recommended File Size: For optimal performance, keep each image under 10MB
  • High-Resolution Image Utilization: Zoom functionality allows comparison of high-resolution image details. Large images can be operated smoothly
  • Pan Function Utilization: For large images or when zoomed in, drag the image area to quickly move to the desired area

Privacy and Security

All operations are performed within your browser; image data is never sent to any server.

Image Sharing

It is not possible to share the compared images using a shared link.
*Note: The sharing feature has been highly requested, so we're considering offering it as a separate service 🫡