We are currently in the open beta phase. Each update introduces more polished functionalities, loaded with extra features.

Responsive Design Checker for Every Device

No more device-hopping or manual browser resizing – Pixefy puts all your responsive views in one place.

See it in actionStart Your Responsive Test
It’s free to use!
Your website
Mobile
Your website
Tablet
Your website
Laptop
Your website
Desktop

Instantly see how your website looks on mobile, tablet, laptop, and desktop at the same time

All-in-one responsive web design tester that lets you quickly fine-tune layouts with synchronized interactions

View every screen size in a single tab

Pixefy displays multiple device views simultaneously in one browser window so you don’t have to constantly switch devices or resize your browser. Spot layout issues at a glance and ensure a consistent design on every screen.

Split-screen comparisons

Compare mobile and desktop views side by side without switching windows. Instantly catch discrepancies between layouts.

Synchronized interactions

Scroll or click in one view, and all other device views will mirror the action. This synchronized testing simplifies testing navigation and interactive elements in parallel.

300+ Device Presets & Custom Viewports

Guarantee your site looks perfect on any device. Pixefy comes loaded with 300+ built-in device profiles, covering popular phones, tablets, laptops, and desktops. Instantly preview your design on iPhones, Android devices, iPads, and more using pre-defined screen dimensions. Have a unique size in mind? Create your own custom viewport or device preset and save it for future testing. You can even simulate different browsers and OS environments with ease.

Extensive device library

Choose from over 300 device presets to test on common screen resolutions and aspect ratios. No manual setup – just pick a device profile and go.

Custom breakpoints

Define and save custom device sizes or breakpoints for specialized testing needs. Tailor the tool to your project’s unique responsive requirements.

User agent simulation

Simulate 100+ different browsers and operating systems via preset user agent strings. Ensure your responsive website behaves correctly on each browser/OS combination, just as it would on real devices.

Customizable Workspace & Advanced Controls

S your testing workspace to fit your workflow. Pixefy’s flexible interface lets you rearrange and configure your device preview panels however you like. Stack views vertically, arrange them side by side, or any layout you prefer. You can also fine-tune how your previews appear and interact

Flexible Layout

Drag and resize device panels to organize your workspace. View multiple screens in a column or row, and switch between vertical or horizontal layouts on the fly.

Scrollbar toggle

Show or hide scrollbars in the device previews with a click. This helps you accurately inspect full-width sections and identify any overflow or scrolling issues in your design.

Global zoom control

Zoom in or out on all device views at once (or adjust each one independently) for pixel-perfect inspection. Whether you need a closer look at mobile details or to see the entire layout scaled down, Pixefy gives you precise control.

Get Started – Free & Easy

A professional yet easy-to-use tool built for developers, designers, and QA testers to simplify responsive design reviews. Join over 4,000 users who have already improved their workflow

Get the Pixefy extension
Make your website look great on every screen!

Why Responsive Design Matters

A responsive website isn’t just a nice-to-have – it’s essential for success in today’s multi-device world. Here’s why making sure your site is mobile-friendly should be a top priority

🚀 Faster debugging

Using an all-in-one responsive checker helps you spot and fix layout problems faster, so you can iterate quickly and save development time

✓✓ Consistent user experience

Your visitors deserve a smooth experience on any device. A responsive design ensures users can navigate and read content easily whether they’re on a phone, tablet, or desktop

🆙 Better search rankings

Google’s algorithm favors mobile-friendly sites, and a lack of mobile optimization can result in lower rankings. In short, a fully responsive website can improve your SEO and help more people discover your site.

See What’s Changed

We’re constantly improving Pixefy. Check out the latest features and updates we’ve added

New
Improvement
Fix
Activity Tab & Bug Fixes
This update introduces a new Activity tab to track CSS changes and brings improvements to syncing, inspect view, and cache handling.
New
Improvement
Fix
Small Fixes & UI Improvements
This small Pixefy update brings smoother shortcut handling, cleaner tooltips, better input behavior, and small DOM tree navigation fixes.
New
Improvement
Fix
Backend Power-Up, New Devices & Smart UI Tools – Pixefy Update
Pixefy just got a major upgrade! With 300+ new devices, 100+ user agents, a new DOM navigator, keyboard shortcuts, and backend power – responsive testing is faster, smarter, and more precise than ever.
See more in our
Changelog
FAQ

Frequently Asked Questions

We’ve gathered answers to some of the most commonly asked questions

What is a responsive design checker?

A responsive design checker is a tool that lets you preview how your website appears across various devices and screen sizes. It helps you ensure your website looks and functions properly on mobile phones, tablets, laptops, and desktops without manually testing each device separately.

How does Pixefy’s split-screen mode work?

Pixefy’s split-screen mode allows you to view and compare multiple device layouts simultaneously within a single browser window. For example, you can check your desktop layout side by side with a mobile or tablet view, quickly identifying any design inconsistencies or responsive issues.

Can I add custom device sizes or breakpoints?

Yes, Pixefy enables you to create and save custom device presets. This feature lets you test specific or unique resolutions relevant to your project, ensuring complete coverage beyond our built-in presets.

How many devices can Pixefy simulate?

Pixefy includes over 300 device presets for popular smartphones, tablets, laptops, and desktops. Additionally, you can customize and add your own device dimensions, offering virtually unlimited options for responsive testing.

Does Pixefy support different user agents?

Yes, Pixefy provides over 100 popular user agent strings, enabling you to simulate how your website behaves on various browsers and operating systems. This ensures accurate testing and helps catch compatibility issues early in the development process.
‍Note: Due to Manifest V3 browser extension restrictions, setting different user agent strings for each individual device view simultaneously is currently not supported. All views share the same user agent at any given time.

Can I rearrange the workspace according to my preferences?

Absolutely. Pixefy offers extensive workspace customization. You can easily rearrange, resize, and reorder device views vertically or horizontally, adapting your testing environment to perfectly fit your workflow.

Does Pixefy synchronize scroll and click events?

Yes. With synchronized events, scrolling or clicking within one device preview automatically mirrors the action across all other views. This helps you quickly test interactive elements, navigation, and page functionality across multiple screen sizes simultaneously.

Can I control scrollbar visibility?

Yes. Pixefy lets you toggle scrollbar visibility on or off. This feature makes it easier to inspect designs and identify overflow or scroll-related layout issues, providing a cleaner and more precise testing experience.

What is global zoom?

Global zoom lets you simultaneously zoom in or out across all device views at once. This is particularly helpful when performing detailed design inspections or quickly getting an overview of your layout across different devices.

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