Screen Resolution Simulator Preview Any Webpage
Tailor a live website preview to match any screen.
Pick a popular device, flip the orientation, or dial in an exact pixel size. We will open a sandboxed window sized to your selection so you can iterate fast on responsive layouts.
Simulation summary
- Viewport width
- Viewport height
- Aspect ratio
- Preset
Scaled viewport preview
The visual frame mirrors your aspect ratio. Launch the preview window to interact with the live site at this size.
Ready-to-copy CSS helpers
Responsive design checklist
- Verify breakpoints by combining this tool with your browser devtools—target the same pixel widths for consistent QA.
- Test both orientations for mobile layouts; the simulator swaps width and height instantly.
- Capture screenshots from the popup window to document UI states for stakeholders or release notes.
Table of Content
See how a page looks on phones, tablets, laptops, and ultra-wide monitors in seconds. The Screen Resolution Simulator serves as a quick and adaptable testing tool. It also works well for checking viewports. Paste a URL, choose a size, and preview instantly with a reliable website preview tool.
Preview Any Page at Different Sizes
Give your team a rapid way to validate layouts before launch. You can paste a URL, choose a preset, or enter custom sizes. This helps you test the website at different sizes. You can find issues early without needing a device lab or developer tools.
Enter a URL to Start
Use a live, staging, or share link. This way, fonts, scripts, analytics, and content will show exactly as users see them. This is important for both mobile previews and desktop checks.
Choose a Preset or Set Custom Dimensions Body
Switch between common mobile, tablet, and desktop sizes. You can also enter a specific width and height to match design specs and data outliers. This doubles as a webpage size tester for pixel-critical pages.
Rotate Portrait or Landscape and Open in New Tab
Flip orientation to expose tablet and phone edge cases. Open the Preview in a new tab to share screenshots and get a quick sign-off.
Why Use a Screen Resolution Simulator
Keep Key Content Above the Fold
Ensure the hero, headline, and primary CTA stay visible at smaller widths such as 390 to 414 px. If you hide important actions, you can change the spacing, shorten the text, or resize parts before launching.
Validate Navigation, Grids, and Forms
Stress test hamburger menus, sticky headers, and off-canvas panels. Check card grids for awkward layout shifts and confirm forms remain readable and tappable on touch screens.
Confirm Responsive Breakpoints Before Launch
Sweep common widths to see where components shift. If it stays at 360 and 414 but breaks at 390, add a breakpoint. You can also adjust the min and max widths to make the design work better.
How the Screen Resolution Simulator Works
Popular Phone, Tablet, and Desktop Presets
Cover the majority of scenarios fast with go-to widths
320, 360, 390, 414, 768, 1024, 1280, 1440, 1920, 2560, 3840
Pixel Perfect Custom Width by Height
Enter exact dimensions for landing pages, dashboards, and app-like layouts. Ideal when you need a precise desktop resolution tester.
Viewport vs Screen Resolution
The viewport is the area in CSS that controls how things look on different devices. Screen resolution refers to the pixel grid of the device. Consider the resolution as the background. Focus on the viewport first.
How to Use the Screen Resolution Simulator
Paste URL, then Pick Size, then Preview
. Work from small to large. Mobile to tablet to desktop to large desktop. This sequence exposes stress points early and reduces rework.
Spot Issues and Capture Screenshot
Scan header, hero, primary CTA, product cards, forms, and footer. Capture problem widths such as menu wraps at 390 px and add concise fix notes for faster turnaround.
Pro Tips for Smooth Layouts
• Keep menu labels short and put the main action first.
• Use flexible grids with sensible gaps to avoid orphans
• Define media containers and use responsive images to prevent layout shifts
Screen Resolution Simulator Fixes and Quick Wins
Fix Menu Overlaps and Sticky Headers
Shorten labels, move secondary links to overflow, reduce padding, and verify sticky offsets so content is not hidden.
Improve Card Wrapping at Tablet Widths
Around 768 to 1024 px switch to two steady columns with predictable gaps. Avoid almost three columns that force ragged wraps.
Sharper Images with Responsive Sources
Provide responsive images such as srcset and sizes, and define container sizes. You get crisp visuals for both mobile and desktop while keeping the layout stable.
Optimize Further With These Tools
Google SERP Simulator: preview title and meta before publishing.
Spider Simulator: find what crawlers capture on your page
Open Graph Check: validate share title, description, and image.
User Agent String Viewer: confirm detected browser and device details.
Change Screen Resolution: switch your own display for demos or screenshots.
Controller Vibration Tester: verify in browser gamepad detection and rumble.
API Documentation Coming Soon
Documentation for this tool is being prepared. Please check back later or visit our full API documentation.
Frequently Asked Questions
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It accelerates layout checks and catches most responsive issues. For hardware quirks such as scroll behaviour, rendering, and input, do spot checks on target devices and browsers.
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Yes. Enter precise widths and heights to match your design system or analytics outliers. Great for fold-sensitive landing pages.
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The layout mainly depends on width, but density also affects image sharpness and some media queries. Check it at one dense width and one standard width to make sure the visuals are consistent.