Window Resizer
Resize your browser window to custom sizes, test layouts, emulate resolutions, and improve productivity with multi-monitor support.
Stop guessing your window size. Rulerito sits quietly in the corner, tells you the exact pixels, and lets you resize it.
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Rulerito: Rule your viewport.
Testing responsiveness shouldn't be a hassle. Rulerito is a lightweight, developer-friendly tool that lives quietly in the bottom-right corner of your browser.
Why use Rulerito? Instead of constantly opening DevTools or guessing dimensions, Rulerito gives you instant visual feedback and precise control right where you need it.
Key Features: Live Dimensions: See your current viewport width and height in real-time. Pixel-Perfect Resizing: Manually input dimensions to resize your window instantly. Custom Presets: Save your most-used resolutions (Mobile, Tablet, Desktop) and switch between them with one click. Non-intrusive UI: Designed to look like a precise tool—dark mode, clean typography, and "always in your corner" without blocking your view.
Perfect for:
Frontend Developers
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Resize your browser window to custom sizes, test layouts, emulate resolutions, and improve productivity with multi-monitor support.
Pixel measurement: An online ruler for measuring pixels on screen
Easily set the layout (size & position) of your browser window
Use screen ruler for Chrome measure pixels on screen and as browser plugin. Get pixel ruler extension for website page dimensions.
Resize browser windows to test layouts on different resolutions with multi-window support.
Page Ruler: Drag guidelines and inspect element properties for perfect UI practice in browser.