Responsive Checker
Preview any website across multiple device viewports simultaneously. Test mobile, tablet, and desktop responsiveness in real-time.
Multi-Device Preview
Enter a URL and load previews. Select a bundle below to populate default devices.
Parameters
X-Frame-Options Notice: Sites that set X-Frame-Options: DENY or frame-ancestors 'none' will render a blank panel. This is a browser security feature. Try our Website Screenshot tool for those sites.
Professional Responsive Checker for Everyone
A professional Online Responsive Design Checker that lets you preview any website across multiple device screen sizes simultaneously in real-time. Powered by live iframes, it renders the actual website at configurable viewport widths and heights for 14+ popular devices including iPhone SE, iPhone 14 Pro Max, Galaxy S23, Pixel 7, iPad Air, iPad Pro, Surface Pro, and common laptop/desktop resolutions. Each device panel is individually controllable — switch to landscape mode, zoom in/out, or remove panels freely. The drag-and-drop panel grid supports three layout modes: Grid, Columns, and Focus. Add custom viewport dimensions for precise breakpoint testing. Includes a built-in CSS breakpoint reference table covering Tailwind, Bootstrap, and vanilla media query patterns.
Key Benefits
Why choose our Responsive Checker for your workflow?
Instant Multi-Device QA: Catch responsive layout bugs across screen sizes without needing real devices.
Developer Friendly: CSS breakpoint reference included to correlate viewport widths with framework classes.
No Extensions: Works entirely in your browser with zero installations or plugins.
Common Use Cases
Real-world examples of how to use this tool.
Web Development: Verify responsive breakpoints before deploying a new design.
QA Testing: Spot layout issues across mobile, tablet, and desktop simultaneously.
Client Presentations: Show how a site looks on multiple devices in a single view.
How to use Responsive Checker?
Follow these simple steps to get the best results.
Enter the website URL in the input bar.
Click 'Preview' to auto-load mobile, tablet, and desktop views.
Or click 'Add Device' to pick specific device presets from the panel.
Use the Rotate button to switch any panel between portrait and landscape.
Adjust per-panel zoom using the zoom controls in each device header.
Switch between Grid, Columns, and Focus layout modes as needed.
Add a custom viewport by selecting 'Custom Size' and entering dimensions.
Frequently Asked Questions
Common questions about our Responsive Checker tool.
Why are some websites showing a blank panel?
Some websites use X-Frame-Options: DENY or Content-Security-Policy headers that block iframe embedding. This is a browser security feature and cannot be bypassed. For those sites, use the Website Screenshot tool instead.
Does it change the actual screen resolution?
No — it sets the iframe container width and height to match the device viewport. The browser still renders at your physical screen resolution, but the site layout adapts to the specified CSS viewport dimensions.
Discover More Tools
Hand-picked utilities to speed up your workflow.
Expert Insights
Learn more about privacy, image processing, and modern design.
How AI is Revolutionizing Image Editing
Explore the profound impact of neural networks on modern creative workflows, from automated background removal to generative upscaling. Learn how AI tools are democratizing professional-grade design for everyone.
The Importance of Privacy-First Web Tools
In an era of constant data tracking, discover why client-side processing is the future of digital security. We dive deep into how Imgira protects your sensitive data by keeping everything in your browser.
WebAssembly: Powering the Next Gen of Browser Apps
Discover how WebAssembly (Wasm) is bridging the gap between desktop performance and web accessibility. Learn why complex image processing can now happen instantly within a standard web browser.
Mastering Image Compression Without Quality Loss
Unlock the secrets of efficient web performance by mastering the balance between file size and visual fidelity. We compare modern algorithms and show you how to optimize assets for the fastest load times.