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 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
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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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Excelente aplicación, no funciona con LOCALHOST, debe estar el sitio en un servidor externo.
It's better then the rest of the similar extensions, however on reload resets the size of the viewport, so it's kind of useless for development. Would be nice to implement this just like like Firefox does.
Great extension. The 5th star wasn't given due to having to store custom sizes in a bookmark which isn't user friendly. Apart from that, it's the best as it only the resizes the viewport instead of the entire window like other extensions.
Was really excited when I seen this, makes my developing go a lot faster 5/5
Inconsistently works for me, that is, I click on the icon and it does not respond or prompt me with options. When it does work, it resizes to the selected specification but is very frustrating when I am constantly clicking and it's not doing anything.
Should work with localhost or file system as well, where most of the testing is done. It seems to require a functioning website, which is silly.
I also love that it does not resize the browser window but only the viewport.
One of the best Developer extensions for testing on multiple devices. Best part is that it does not resize the browser window. I strongly recommend this tool
I love that it does not resize the browser window but only the viewport, unlike most other resizing extensions.
ชอบที่สุดตั้งแต่ใช้มา ถ้าสามารถ edit custom size และ range ในการทำ animation ด้วยจะเยี่ยมมาก --------- Best re-sizer tool for me, please make custom size easier (via live textbox) and configurable animation range for better