Image Comparison SliderCompare two images side-by-side with an interactive before/after slider.
Image Comparison Slider
Compare two images side-by-side with an interactive before/after slider.
Upload Two Images
Drop or select your before and after images.
Drag to Compare
Use the slider handle to reveal each image side by side.
Download Composite
Capture a screenshot of the comparison at any slider position.
What Is Image Comparison Slider?
An interactive image comparison slider that lets you place two images side by side with a draggable divider. Perfect for before-and-after comparisons, A/B testing designs, showing editing progress, and highlighting differences between image versions. The slider handle can be dragged left or right to reveal more of either image. Works with touch and mouse for mobile and desktop use.
Why Use Our Image Comparison Slider?
- Interactive drag-to-compare slider
- Works on mobile touch and desktop mouse
- Visual before/after reveals
- Download comparison at any slider position
Common Use Cases
Photo Editing
Show before and after results of photo retouching and color grading.
Design Reviews
Compare design iterations side by side for stakeholder feedback.
Real Estate
Show renovation or staging before-and-after comparisons.
Product Demos
Demonstrate the effect of filters, edits, or enhancements.
Technical Guide
Two images are stacked using absolute positioning. The top image uses CSS clip-path: inset(0 X% 0 0) where X is derived from slider position. Mouse and touch event listeners track drag position as a percentage of container width. Canvas compositing generates the downloadable output by drawing both images and a divider line.
Tips & Best Practices
- 1Use images of the same dimensions for best results
- 2The slider works best with aligned subjects
- 3Download captures the comparison at the current slider position
- 4Great for demonstrating image processing results
Related Tools
Image Collage
Combine multiple images into a single collage with customizable layouts and spacing.
Image Tools
Image Blend Modes
Apply Photoshop-style blend modes between two images: multiply, screen, overlay, and more.
Image Tools
Image Resizer
Resize images by exact pixel dimensions or percentage while maintaining aspect ratio.
Image Tools
Image Crop
Crop images with a visual selection rectangle to remove unwanted areas.
Image Tools
Image Rotate
Rotate images by any angle with preset options for 90, 180, and 270 degrees.
Image Tools
Image Flip Horizontal
Mirror an image horizontally (left to right) with instant processing.
Image ToolsFrequently Asked Questions
QDo images need to be the same size?
QCan I use it on mobile?
QCan I download the comparison?
QWhat formats are supported?
QIs the slider keyboard accessible?
About Image Comparison Slider
Image Comparison Slider is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.