PixelPerfect Lab - Design Overlay & Measure Tool

Visual design overlay and measurement tools for pixel-perfect web and email development.

PixelPerfect Lab is a visual design and development tool built to help designers and developers achieve pixel-perfect layouts directly in the browser. Use PixelPerfect Lab to overlay your mockups on live websites, measure spacing and alignment, and inspect visual details during web or HTML email development. Key features: • Overlay design mockups (PNG, JPG, SVG) directly on the page • Drag, resize, and align overlays with pixel-level precision • Adjust opacity and blending modes to compare details • Add guides and rulers for accurate references • Measure distances, margins, and element sizes • Inspect page elements and generate CSS values • Pick colors from any element using the color picker • Draw annotations with arrows, lines, and text • Capture screenshots for review or handoff • Preview layouts across predefined responsive viewports • Add multiple images via drag-and-drop or image URLs Who is PixelPerfect Lab for? • Front-end developers • Email developers • Designers implementing UI in code • Teams focused on pixel-perfect accuracy PixelPerfect Lab is designed to be used on demand and focuses on visual accuracy, speed, and productivity. It does not track browsing activity and is activated only when the user chooses to enable it.