Viewport Resizer

Viewport Resizer — Instantly Resize Your Browser Window to Any Screen Size Viewport Resizer is a lightweight, fast, and privacy-friendly Chrome extension that lets web developers, designers, and QA testers resize their browser window to popular desktop and laptop screen resolutions with a single click. Stop guessing, stop dragging, and stop doing mental math with window dimensions. Just click a preset and your browser window snaps to the exact resolution you need. Whether you are building a responsive website, debugging CSS media queries, testing a web application across different screen sizes, or preparing screenshots at specific resolutions, Viewport Resizer gives you instant access to the most commonly used desktop and laptop viewport sizes — all from a clean, minimal popup interface. ──────────────────────────────────────── WHY VIEWPORT RESIZER? Responsive web design is the standard for modern web development. Every website, web app, and landing page needs to look great on a wide range of screen sizes. But testing responsive layouts is tedious. Chrome DevTools device mode is powerful but slow to toggle. Manually dragging the browser window edge is imprecise. And remembering the exact pixel dimensions of popular screens? Nobody has time for that. Viewport Resizer solves this with a dead-simple workflow: click the extension icon, pick a resolution, and your browser window resizes instantly. No configuration. No setup. No learning curve. It works the moment you install it. ──────────────────────────────────────── FEATURES AT A GLANCE One-Click Window Resizing Click any preset in the popup menu and your browser window immediately resizes to that exact resolution. The popup closes automatically after resizing so you can get right back to work. No extra steps, no confirmation dialogs, no friction. Live Dimension Overlay Every time your browser window is resized — whether by clicking a preset or by manually dragging the window edge — a small, unobtrusive overlay appears in the bottom-right corner of the page showing the current window dimensions. The overlay automatically fades away after a moment. This gives you real-time feedback on your window size without opening DevTools or any other tool. Current Size Detection When you open the Viewport Resizer popup, it immediately shows your current browser window dimensions at the top. If your window already matches one of the presets, that preset is highlighted so you always know exactly where you are. Works on Maximized Windows Many resize tools silently fail when the browser is maximized because the operating system locks the window size. Viewport Resizer automatically un-maximizes the window before applying the new dimensions, so it works reliably every time — even if your browser is in a maximized or snapped state. No Permissions Required Viewport Resizer does not request access to your browsing data, your tabs, your history, or any other sensitive information. The core resize functionality uses the Chrome windows API, which requires zero special permissions. The only additional capability is a lightweight content script that displays the dimension overlay on the page — and that script does nothing except create a temporary visual indicator. It does not read, collect, or transmit any data from the pages you visit. Minimal and Fast The entire extension is under 10 KB. There is no background service worker consuming resources when you are not using it. There are no analytics, no tracking, no telemetry, and no network requests. It loads instantly and runs entirely on your local machine. ──────────────────────────────────────── BUILT-IN PRESET RESOLUTIONS Viewport Resizer comes preloaded with the most popular desktop and laptop screen resolutions used worldwide. These presets cover the vast majority of real-world screen sizes you will encounter when building and testing responsive websites: Full HD — 1920 x 1080 The most widely used desktop monitor resolution worldwide. This is the baseline resolution for most modern websites and the default resolution of countless monitors, external displays, and all-in-one desktops. If you test at only one resolution, this should be it. QHD / 2K — 2560 x 1440 The standard resolution for 27-inch monitors and high-end gaming displays. Increasingly common as display technology improves and prices drop. Important for testing layouts that may behave differently at wider viewports with more horizontal space. HD+ Laptop — 1366 x 768 One of the most common laptop screen resolutions globally, especially in budget and mid-range notebooks. This resolution has been the default for 14-inch and 15.6-inch laptops for over a decade. Critical for testing because many users browse at this size. WXGA+ Laptop — 1440 x 900 A popular resolution for older MacBook models and many Windows ultrabooks. Still widely used across enterprise laptops and refurbished machines. Testing at this resolution helps catch layout issues that appear between the common 1366 and 1920 breakpoints. HD+ Scaled — 1536 x 864 The effective resolution seen by users running Windows laptops at 125% display scaling on a 1920x1080 panel. This is extremely common in the real world because Windows defaults to 125% scaling on many 15.6-inch Full HD laptops. Many developers miss this resolution entirely, making it a frequent source of undetected layout bugs. HD 720p — 1280 x 720 The classic 720p HD resolution. Still relevant for smaller laptop screens, embedded displays, and digital signage. Also useful as a minimum desktop viewport for testing how your layout degrades at smaller desktop sizes before hitting tablet breakpoints. SXGA — 1280 x 800 A common resolution for 13-inch laptops and older MacBook models. This was the standard MacBook resolution for years and is still found on many machines in active use. Useful for testing layouts targeted at smaller laptop screens. WXGA+ — 1600 x 900 Found on many 17-inch laptops and some 20-inch desktop…