Responsive Viewer
Developer Tools
Show multiple screens once, Responsive design tester
Users
400K
Rating
4.2
Reviews
348
7D Growth
+100K|33.3%
Cooling signalUnknownHigh-risk permissions
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.
Users70KCurrent public install base
Rating4.2Store average score
Reviews285Public review volume
Manifest versionV3Extension platform version
7-day growth-10KNet users gained this week
7-day growth rate-12.5%Relative weekly velocity
Preview
6 assetsViewport Resizer: Ultimate Device Emulator & Website Testing Tool Media preview
Trend
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User Growth Over Time
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7-day rating trend
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7-day rating change
Start
4.21
Latest
4.21
7-day rating change
0.00
2026年7月15日2026年7月21日
Growth overview
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1-day growthNo data
----7-day growthDeclining
-10K-12.5%30-day growthNo data
----Technical snapshot
Version, languages, and crawl freshness
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Version2.0.4
ManifestV3
Size134KiB
Languages41Deutsch / English / Indonesia +38
Published
Store updated
Last crawled
DeutschEnglishIndonesiaNederlandsTiếng ViệtTürkçecatalàdanskeestiespañolfrançaishrvatski
Overview
Product summary
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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.
Reviews
Recent review snapshot
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Store average score4.2Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.1Average computed only from synced review bodies below
Reviews with text168Synced review bodies
Total ratings / reviews285Chrome Web Store public rating/review count
Store average score: 4.2. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Justo lo que necesitaba! A mi SI me funciona en 127.0.0.1 / localhost perfectamente!
能保存设置吗。每次开页面都要点多一次
настройка тут: https://lab.maltewassermann.com/viewport-resizer/ выбираете девайсы/дописываете свои и перетаскиваете кнопку Your customized bookmarklet в избранное отлично работает
Easy, working, but one type with an example on different screen sizes would be great, like material.io had (though their Resizer tool isn't working at all, bad stuff)
This extension has saved my life. Literally. Recently, our workplace website was upgraded and this new site could no way be adjusted to a mobile screen display. But by using Kiwi browser + this extenion, I did get what I wanted. An thereby could avoid the purcahse of a tablet!
Единственная проблема расширения это Access denied: Cross-domain security error на защищённых сайтах Полезная в обычных случаях копия скрипта работает даже оффлайн, но в случае защиты от кроссдоменных атак не разрешает запускаться из фрейма. Известно, что из JS это никак не решить (это правильное поведение), поэтому это не проблема расширения. Для таких случае просто нужно искать что-то другое.
La califico con 1 estrella porque no sirve para trabajos en Local. Era para lo que lo necesitaba, una lástima. Aún así funciona perfecto en webs que están en servidores.
Too bad it doesn't work for local files. I wanted to use it as a dev tool...
SO USEFUL! Thank you so much!
Excellent extension. Does not require any privileges, resizes just the viewport and works for resolutions larger than your own screen. The animate feature is great for seeing all sizes one by one without lifting a finger. Recommended for developers.