Product Feature
Visual Comparison for Design QA
Compare your design specs against live implementations. See exact visual differences and validate implementation accuracy in real time.
How Visual Comparison works
Visual Comparison renders your design spec as a semi-transparent layer on top of the live webpage in your browser. You can adjust opacity, toggle the comparison on and off, and pan across the page to spot differences between design and implementation. When you find a discrepancy, OverlayQA's capture and AI tools turn it into a structured, exportable issue.
When you spot a difference, click on the element to capture its exact CSS properties, DOM selector, and a screenshot of the discrepancy. OverlayQA's AI analyzes the visual differences, so instead of saying "the spacing looks wrong," you can report that a component has 16px padding when the spec calls for 24px. This precision eliminates ambiguity and lets developers fix issues in a single pass.
Visual Comparison works across any staging environment accessible in your browser, including localhost, preview deployments, and production URLs. Browse your Figma files from the extension, select the frame you want to compare, and start reviewing without exporting PNGs or taking screenshots.
Why visual comparison matters in website design and development
- Eliminates tab-switching — Compare design specs and live implementations in the same view instead of toggling between tools.
- Pixel-precise reporting — Click any element to capture exact CSS values and DOM selectors, giving development teams actionable context instead of vague feedback.
- Catches what manual review misses — Subtle spacing, color, and typography differences that human eyes miss become visible when design and implementation are compared side by side.
- Protects the final product — Visual comparison catches drift before it reaches production, ensuring the user experience matches the original design intent across every release.
- Share findings with anyone — Generate a public link to share captured issues with stakeholders, clients, or teammates who don't use OverlayQA. No login required.
Frequently asked questions about visual comparison
- What is visual comparison in OverlayQA?
- Visual comparison overlays your design, a Figma frame or an uploaded image, on the live page in the browser. You adjust opacity to spot differences, drag a divider to sweep between design and build, and click any element to inspect its computed CSS values.
- Do I need Figma to use visual comparison?
- No. You can upload an image as the comparison source and overlay it on the live page. Connecting Figma through OAuth adds a frame browser and two-way comment sync, but it is optional.
- How is visual comparison different from visual regression testing?
- Visual regression tools diff screenshots of past builds against new builds, so they catch changes but not whether either build matched the design. Visual comparison checks the live page against the design source of truth during implementation, before a wrong baseline gets locked in.
- What is scrub mode?
- Scrub mode is a clip-reveal comparison: a vertical divider you drag across the page, showing the design on one side and the live build on the other. It makes spacing and alignment differences visible without toggling opacity back and forth.
- Can I capture issues while comparing?
- Yes. Click any element during a comparison to capture a screenshot, the CSS selector, and computed values like padding, font, and color. AI drafts a structured issue you can export to Jira, Linear, Notion, Asana, or Trello.