Viewport Resizer: Ultimate Device Emulator & Website Testing Tool
Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool.
As of June 2026, Viewport Resizer: Ultimate Device Emulator & Website Testing Tool has 80,000 users and a 4.21/5 rating from 285 reviews in the Developer Tools category.
Usersno change0%
80.0K
80,000
Ratingno change0%
4.21
285 reviews
Reviewsno change0%
285
Version
2.0.4
Manifest V3
History
1 snapshotsTracking since Apr 18, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 18, 2026 | 80.0K | 4.21 | 285 | 2.0.4 |
| Now | 80.0K | 4.21 | 285 | 2.0.4 |
Permissions & access
- Permissions
- activeTabscriptingdeclarativeNetRequeststorage
- Host access
- <all_urls>
Screenshots
About
Enhance your web design experience with our dynamic testing and presentation tool, designed to create, test, and showcase your digital experiences on any device, from wearables to very big screens. Customize your workspace fully and use or create your own device mockups, explore various display resolutions, and harness advanced emulation features like touch fingerprint simulation, user-agent emulation, and breakpoint guide, all within a professional-grade environment built for high-quality development and debugging. Push your limits with an intuitive zoomable workspace, precise ruler and grid tools, and a sleek presentation mode called 'Coffee Mode' — think of this tool as a first-level approximation of how your digital experience looks and feels across multiple devices. Limitations: While our tool provides comprehensive device simulations, it does not replace the need for physical device testing.
Technical
- Version
- 2.0.4
- Manifest
- V3
- Size
- 134KiB
- Min Chrome
- 88
- Languages
- 41
- Featured
- Yes
Metadata
- ID
- kapnjjcfcncngkadhpmijlkblpibdcgm
- Developer ID
- u4cb8ebfd614ded47e0cc08258e30cce7
- Developer Email
- [email protected]
- Created
- Sep 13, 2013
- Last Updated (Store)
- Dec 16, 2025
- Last Scraped
- Jun 3, 2026
- Website
- —
- Support URL
- —
- Privacy Policy
- —
Similar extensions
Alternatives to Viewport Resizer: Ultimate Device Emulator & Website Testing Tool, ranked by description similarity.
Device Simulator & Tester
Test sites on multiple devices in one tab. Improve development, UI/UX, & QA with live previews.
3.0K
★ 4.7
Screenlytic
Advanced mobile device emulator with responsive viewer, multi-device layout, touch events, and authentic mobile interaction
—
ViewPortify – Mobile Simulator & Responsive Design Testing Tool for Chrome
Mobile simulator for testing responsive designs across devices. Instantly preview and resize viewports in Chrome.
31
E-ink Simulator Extension
Chrome extension for web developers to test and optimize applications for e-ink devices
21
★ 5.0
Pixefy - Responsive Design Checker
Preview and debug your website’s responsiveness across multiple devices in real-time, all inside one browser tab.
10.0K
★ 4.5
Mobile Preview Dev
Preview any webpage in mobile device views - built for developers
44
U-Eyes: Mobile Simulator
Test any website on iPhone & Android mobile devices. A powerful mobile simulator with screenshots & beautiful device mockups.
10.0K
★ 4.5
Responsive Viewer
View any webpage in different device dimensions with custom sizing
391
★ 5.0
Data sourced from the Chrome Web Store · last verified Jun 3, 2026.