📊 Image Compare
Compare two images with an interactive slider, side-by-side, or overlay mode. Perfect for before/after, compression quality checks. 100% browser-based.
Upload two images to start comparing
Image Compare: Compare two images side by side
Image Compare lets you compare two images side by side. Upload two images and get a visual comparison — all processed locally in your browser, with no uploads and no sign-up.
Spot differences between two versions
Spot differences between two versions. This is one of the most common reasons people reach for Image Compare — and it handles the job in seconds, entirely in your browser.
Compare before-and-after edits
Compare before-and-after edits. This is one of the most common reasons people reach for Image Compare — and it handles the job in seconds, entirely in your browser.
Quality-check retouched images
Quality-check retouched images. This is one of the most common reasons people reach for Image Compare — and it handles the job in seconds, entirely in your browser.
Everything You Need in a Image Compare
Powerful features that make Image Compare fast, private, and free.
Instant Analysis
Results appear the moment you upload or paste.
Detailed Output
Get precise statistics, codes, or comparisons.
100% Private
All analysis is local — nothing is uploaded.
Non-Destructive
Your original files are never modified.
Free Forever
No sign-up, no limits, completely free.
Cross-Platform
Works on any device with a modern browser.
How to Use
Upload Both Images
Click each upload area to add Image A and Image B.
Choose Mode
Slider, Side-by-Side, or Overlay — pick what works best.
Compare
Drag the slider or adjust overlay opacity to compare.
Download
Save the comparison as a single combined image.
Detailed User Guide
Step 1: Upload Both Images
Click the Before / Image A area to upload your first image, then click After / Image B for the second. Supported formats: JPG, PNG, WebP, GIF, BMP. Both images load instantly in your browser.
Step 2: Choose Comparison Mode
Three powerful comparison modes:
- Slider: Drag the vertical slider to reveal the before/after. Best for compression comparisons and retouching before/after.
- Side by Side: Both images displayed next to each other. Best for quick visual comparison.
- Overlay: Image B overlaid on Image A with adjustable opacity. Use the slider to control transparency. Best for spotting subtle differences.
Step 3: Interact & Compare
In Slider mode, drag the blue vertical bar left and right. In Overlay mode, use the opacity slider. In Side by Side mode, scroll to see both images fully.
Step 4: Download
Click Download Comparison to save a combined image (side-by-side layout) as PNG. This is useful for sharing comparison results.
Best Use Cases
- Compression quality: Compare original vs. compressed image to check quality loss
- Before/after editing: Show the result of photo retouching or filters
- Design iterations: Compare two design versions side by side
- Image upscaling: Compare low-res original vs. upscaled result
- Background removal: Compare original vs. background-removed result
Pro Tips
- Use Slider mode for compression comparisons — it makes quality differences immediately visible
- For subtle differences, use Overlay mode with opacity around 50%
- Side-by-Side mode is best when both images have very different compositions
- For sharing, download the comparison and post it directly to social media
- Use this tool after using our Compressor to visually verify quality before/after