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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Tiện ích mới được update nhìn xịn ạ, dùng khá là oke ạ
Большое спасибо, не давно наткнулся на ваше расширение, очень помогает, иногда даже подспасает))
é incrível
Sometimes work but most of the time it's not even start only showing a status on extension icon as on but nothing happening and in localhost not working at all
いつも利用させていただいています。 mampでローカル環境で作成中のサイトが表示されなくなってしまいました。 httpsでないからでしょうか？ ローカルではssl化せずに作成しており（毎回設定が大変だから） なんとか今まで通り、表示させることはできないでしょうか？ 返信ありがとうございます。 確認したところ、自分の環境では、 ローカルサイトであろうが、既存のwebサーバーであろうがhttpでは機能しませんでした。 MAMPの設定でssl化したところ、うまく起動しました。 代替えプラグインを探しましたが、これより良いものがなかったので、 これからはSSL化して使っていきます。 これからもよろしくお願いします。 ありがとうございました。
The best
If it doesn't work on localhost it makes no sense at all. This is supposed to be a developer tool, I need it to work when I'm developing.
Good, but like many of this kind of tools it need to be updated with new resolutions for mobile. Right now you can look at iPhone 5 to 8 when their is iPhone 15 Pro Max out on market
C'est très bien, seul problème, a chaque modification de mon code, la page se refresh et on "perd" l'extension, il faut recliquer sur l'icon et redefinir la taille desiré. Du coup inutilsable pour moi, dommage. Il faudrait que l'extension restaure ce qui a été defini entre les refresh
not work in localhost web, need to be hosted.Tried www.responsinator.com/, better and you can test for localhost