Tech & Digital Art 60 FPS Hardware Accelerated
Visual Regression Testing Before & After Slider: Catch Pixel Shifts in CI/CD
Pinpoint 1px layout displacements, rogue CSS margin collapses, and font rendering drift using interactive difference overlays.
Embed This Interactive Slider on Your Site
Works with WordPress, Webflow, Shopify, Squarespace, Ghost, Notion, and HTML websites.
<iframe src="https://diffslider.app/embed/demo-visual-regression-testing-pixel-diff" width="100%" height="600" frameborder="0" allowfullscreen loading="lazy" style="border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; overflow: hidden; max-width: 100%;"></iframe>
Customizing your embed:
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?theme=light– Force clean white background -
?toolbar=0– Ultra-clean minimalist mode (slider only) -
?pos=65– Set default divider split position to 65% -
?mode=side– Default to side-by-side mode
Make Your Own
Create Your Own Before & After Comparison
Drag & drop 2 to 10 photos. No software to install, no watermark, 60 FPS mobile-ready.
- ✓ Free & no credit card required
- ✓ Up to 1600% synchronized pixel zoom
- ✓ Instant permanent link & embed snippet
Photography & Alignment Protocol
- 使用 Headless Chromium 以固定视口尺寸（如 1440x900@1x）抓取无头渲染截屏；
- 锁死动画状态（`animation: none !important; transition: none !important;`）；
- 屏蔽时间戳、动态轮播等动态非确定性（Flaky）元素后再生成图像。
Frequently Asked Questions
Why is a pixel diff slider better than just an automated pass/fail? ▼
Developers can slide across to visually see if a 3-pixel text wrap shift broke a checkout button.