🔍 图片对比
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
图片对比：并排对比两张图片
图片对比让你并排对比两张图片。全部在浏览器本地处理，无需上传、无需注册。
找出两版差异
找出两版差异。这是人们使用图片对比最常见的理由之一——几秒内即可在浏览器中完成。
对比编辑前后
对比编辑前后。这是人们使用图片对比最常见的理由之一——几秒内即可在浏览器中完成。
质检修图效果
质检修图效果。这是人们使用图片对比最常见的理由之一——几秒内即可在浏览器中完成。
图片对比所需的一切功能
让图片对比快速、私密且免费的强大功能。
即时分析
上传或粘贴瞬间即出结果。
详细输出
获得精确的统计、代码或对比。
100% 隐私
全部本地分析——不上传任何内容。
无损操作
原文件绝不会被修改。
永久免费
无需注册、无限制、完全免费。
跨平台
任意现代浏览器设备可用。
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