Screen Ruler is a Chrome extension for measuring and inspecting live web pages. By popular demand, it now supports editing. Click an element, see its matched CSS, tweak values inline. Works on :hover/:focus and inside @media rules with every single change tracked and viewable in one place.

Unlike browser DevTools, Screen Ruler is built for design workflows: visual flexbox/grid breakdown, gradient inspection with color stops, multi-element pseudo-state simulation, CSS-to-Tailwind conversion, and a Page tab with Performance, SEO, and Social previews.

Screen Ruler is the complete inspection suite for web developers and designers. Measure elements, catch accessibility issues, extract colors and assets, and inspect CSS properties