screenShift
Chrome Manifest V3 Extension • 40+ Devices • Instant Localhost Sync

Test responsive designs across 40+ realistic devices in one click.

The realistic mobile simulator for frontend engineers, QA testers, and designers. Preview live URLs and localhost with pixel-accurate bezels, touch physics, and instant mockup capture.

No Signup Required 100% Client-Side Privacy Zero-Config Hot Reload
Extensive Device Matrix

40+ Precision Viewports & Hardware Bezels

Cycle through authentic mobile flagships, tablets, foldables, and ultra-wide displays with real physical pixel ratios and camera notches.

Built for Modern Frontend Workflows

Everything engineers need to ship flawless mobile experiences.

ScreenShift delivers pixel-accurate hardware simulation, localhost tunneling, and touch physics in one lightweight extension.

Net Engine

Zero-Config Localhost

Test Next.js, Vite, and Remix on localhost:3000 with real-time CSP and X-Frame-Options stripping.

localhost:3000
0ms sync
Fast Refresh Synced
Synthetic Events

Natural Touch Physics

Converts mouse interactions into authentic TouchEvent streams with inertia, touch radius, and swipe detection.

onTouchStart()
Swiper & Carousel Ready
Mockup Export

1-Click Framed PNG

Render ultra-crisp composite screenshots inside physical hardware bezels for PRs, reviews, and client decks.

2x Retina PNG3x Ultra PNG
Instant Clipboard Copy
Hardware Fidelity

Dynamic Island & Bezels

Avoid layout breakage beneath iPhone Dynamic Islands, punch-holes, bottom sheets, and safe area insets.

DEV
env(safe-area-inset) Safe
Transparent & Developer Friendly

Start Free, Upgrade for Power Features

Install the community extension for essential testing, or unlock full multi-device synchronization and QA exports with Pro.

Community

For hobbyists and casual testing

$0forever free
  • 15+ Core Mobile & Tablet Presets
  • Localhost & Live URL Testing
  • Synthetic Touch Events
  • Portrait & Landscape Toggles
Most Popular

ScreenShift Pro

For frontend engineers & QA teams

$9/ month (billed annually)
  • All 40+ Devices (Foldables & Ultrawide)
  • One-Click Framed Screenshot Exports
  • Multi-Device Synchronized Scrolling
  • Custom Resolution & DPR Overrides
  • Priority Feature Updates

Team / Studio

For agencies and product organizations

$29/ month for 5 seats (annual)
  • Everything in Pro for all team members
  • Shared Preset Collections
  • Centralized Billing & Seat Management
  • Dedicated Support Slack Channel
Frequently Asked Questions

Got Questions? We Have Answers.

Everything you need to know about ScreenShift extension, security, and developer workflows.

Yes, absolutely! ScreenShift is engineered specifically for frontend developers. It uses Chrome Extension Manifest V3 Declarative Net Request rules to automatically bypass X-Frame-Options and CSP headers for localhost ports (3000, 5173, 8080, etc.), enabling live hot-reloading without any extra proxy setup.
Instant Setup • No Sign Up Needed

Stop guessing mobile layouts. Test accurately today.

Join thousands of developers shipping responsive websites with zero surprises. Install ScreenShift directly from the Chrome Web Store in under 10 seconds.