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14日2026年7月20日
Growth overview
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1-day growthFlat
00%7-day growthDeclining
-10K-12.5%30-day growthDeclining
-10K-12.5%Technical snapshot
Version, languages, and crawl freshness
Review publication date, version, supported languages, and crawl timestamps.
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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Really useful
Lässt sich nicht schließen und der Browser hängt.
The best one I've tried out of all similar extensions, works perfectly.
A extensão faz o que promete. Muito fácil de operar. Você pode configurar facilmente os dispositivos de seu interesse. Recomendo!
The older version of this extension worked perfectly for all URLs. However, in the new version, I am unable to test the test domains, and it also does not work with HTTP versions. Could you please verify this?
I prefer the old version, rather than the current version.
Hi, can you add the time ones to the navigation bar?
Estava precisando demais de um desses pros meus projetos!! Isso ajuda bastante!
He probado varias herramientas de este tipo. Algunas de pago incluso. Esta es un muy excelente alternativa. Ligera, con muchas opciones interesantes y muy fácil de usar. Y sí funciona en localhost. Felicitaciones a sus creadores y muchas gracias.
A very reliable tool. These other reviews are harsh lol! There is plenty of functionality + room for configs, which is difficult to find without being harassed for subscriptions. Respect! (it does work on localhost for anybody wondering about the previous review)