Screen Ruler

Key Features

• •Element Inspection: Hover over any element to instantly view its size, margins, paddings, tag name, ID, and classes. This helps understand page structure without diving into the DOM.
• •Distance Measurement: Select an element to measure pixel distances between it and other elements on the page, crucial for verifying alignment and spacing in designs.
• •Live CSS Editing with Change Tracking (Pro): Edit any element's CSS in the side panel with a per-element diff view. Changes can be reverted or copied, making rapid prototyping easy.
• •Accessibility Issues Detection: Automatically detect WCAG contrast failures and get actionable recommendations to ensure compliance with accessibility standards.
• •SEO Issues Detection: Catch missing titles, multiple H1s, missing alt text, and absent meta tags to improve search engine optimization directly from the extension.
• •Color Picker: Sample and copy colors from anywhere on the page using the built-in eyedropper tool, which outputs hex, RGB, and HSL values for quick use.
• •Responsive Mode (Pro): Test designs across different device viewports with an interactive device emulator and custom dimensions, ensuring responsive layouts work correctly.

Use Cases

• •A web designer uses distance measurement and element inspection to ensure pixel-perfect alignment of a landing page, saving hours of manual checking and guesswork.
• •A developer edits CSS live with change tracking to tweak button styles, then copies the modified styles as Tailwind classes to integrate into the codebase.
• •An SEO specialist inspects meta tags and Open Graph data to verify that the page will display correctly on social media, then fixes missing descriptions.
• •An accessibility auditor runs the contrast check tool on text elements, receives recommendations to increase contrast, and updates colors to meet WCAG AA standards.
• •A QA tester uses the page weight breakdown to check the size of scripts and stylesheets, identifying performance bottlenecks before launch.
• •A content editor uses HTML & Text Editing mode to rewrite a paragraph in place, previewing the change before copying it to the CMS.

Who is this for?

Screen Ruler is designed for web developers, front-end engineers, UI/UX designers, SEO specialists, accessibility auditors, QA testers, and digital agency teams. It serves professionals who need to inspect and validate web pages during design, development, and quality assurance phases. The tool is especially valuable for those who frequently switch between multiple browser extensions for different inspection tasks, as it consolidates these into one powerful tool. Freelancers and large teams alike can benefit from its comprehensive set of features, from basic measurement to advanced CSS editing and breakpoint detection.