Developer Utilities

Responsive Viewport & Device Simulator

Test websites and web apps across real device dimensions (iPhone, Galaxy, iPad, MacBook, Desktop) with portrait/landscape rotation and multi-device viewports.

Quick:
Scale:
Preset Devices:
×px
iPhone 15/16 Pro: 393px × 852px (Portrait)Scale: 100%
Note: Some websites (like Google, Twitter) enforce X-Frame-Options: SAMEORIGIN and block embedding in external iframes. Your internal routes and standard client sites will render smoothly.

About this tool

Comprehensive documentation & audit utility guide
Verified Utility

Responsive Web Design (RWD) ensures your website automatically adapts its layout, typography, navigation, and images across various screen sizes and hardware resolutions. Testing multiple breakpoints prevents broken elements, overlapping headers, and Cumulative Layout Shift (CLS).

How it works
1
Enter Website URL

Type or paste your live URL, staging link, or localhost test address.

2
Select Device Viewport

Switch between iPhone, iPad, Galaxy, MacBook, and desktop screen sizes.

3
Rotate & Scale

Toggle portrait and landscape orientations or adjust zoom scaling percentages.

4
Multi-Device Grid

Inspect mobile, tablet, and desktop side-by-side in real-time.

What it checks
10+ Standard device presets (iPhone 15/16 Pro, Galaxy S24, Pixel 8, iPad Air, MacBook)
Live Portrait ⇄ Landscape orientation toggling
Multi-device side-by-side simultaneous viewport testing
Custom pixel width and height dimension testing controls