Mobile/Responsive Web Design Tester
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-17.
Test responsive web designs or mobile pages that detect specific user agents. Test multiple devices at the same time!
The Mobile/Responsive Web Design Tester extension allows Web Designers and Developers to test their web pages against common mobile, phablet and tablet devices by emulating the user agent and screen resolution. Excellent for testing responsive web designs. Easily switch between portrait and landscape mode and test multiple mobile device's at the same time!
Very helpful when your site is in development and testing on actual devices can be difficult.
Although using feature detection is best practice, there are still situations that come up in which you need to detect a devices user agent. The Mobile/Responsive Web Design Tester is unique in that it not only emulates device resolution, but also the device's user agent.
** Version 2.3 (9/2/2020)
- Complete device list revised
- Clear old/eol devices
- Delete donation button
** Version 2.1 (7/30/2015)
- Added a couple new devices
** Version 2.0 (4/5/2015) **
- Added option for enabling/disabling swipe imitation
- Added support for mouse wheel scrolling while in swipe imitation mode
- Added portrait and landscape buttons to make switching between the two modes easier
** Version 1.9 (11/20/2014) **
- Added back button
** Version 1.8 (11/19/2014) **
- Bug fix in scrolling
** Version 1.7 (11/18/2014) **
- Implemented better scrolling
** Version 1.5 (11/16/2014) **
- Updated/added new devices
- Updated layout
- Added donate button
- Didn't change anything, but mouse scroll worked in this round of development. Hopefully it works for everyone in production. We'll see.
- Corrected bug that occurred on https pages.
Latest reviews
Для разработчиков то что нужно. Спасибо. Очень удобно и не нужно постоянно телефон в руки брать. Отображение на экране телефона и в этом дополнении полностью совпадает.
hi that is very poor why it is very funny
Great Extension, not sure if its open source, i would like to contribute, if its open
ótimo, recomendo
Bom
Needs updated to show the latest iphone devices. very dated, but works well
Top
top mesmo!
Muito inteligente.
Gostei muito pratico!
otimaaa feramenta !
Ele é prático para visualizar como fica. Ferramenta ótima.
otimo
ของมันต้องมี
good
bom
this tools very help to my develop
işe yarayan bir uzantı.
Мне понравился, помогло сократить время.
Не эмулирует userAgent.
just what I need for work, thx!
it doesn't work. don't use it.
Good stuff, but bad working with imac, with imac open full screen window when you click on all devices. Please fix it.
This looks great for now! Thank you!
отличный инструмент качества и удобства
WOOOOOOOOW!! BEST EXTENSION EVER! Does what it is meant to do... Donate to this Dev as a show of Gratitude. [BTW, am not affiliated to the dev in any way. Just another HAPPY CONSUMER.]
There is label for emulator (at the bottom) which covers page a bit. Can we remove that by configuration (Or) move the page bit up ?
good
ele é bom mas a desvantagem é que não tem a barra de URL para adicionar os sites, assim tem q ir manualmente no site pra depois ativá-lo
Excellent!
Once clicked on icon to select virtual devices that window takes time (around 10 to 20 seconds)to open. Otherwise is Its nice. Thank you.
awesome
Very Gooooood
powerfull
Esta muy bien, solo hay que recordar que si algo tiene flash lo va a seguir reproduciendo y en iphone no se va a ver así
it is good
Debería integrarla a la ventana que muestra la página
oldukça güzel bir eklenti.
ES LA MEJOR, pero estaria bueno que agreguen dispositivos con las resoluciones actuales.
não funcionou no Chrome com MAC
All is good. tapi sebaiknya hilangkan tulisan "IPHONE 6" di bagian paling bawah tab. cukup mengganggu
This is the best Responsive Web Design Tester. Keep up.
Es muy bueno, el unico problema es que no se actualiza o usa una ventana aparte, cuando me gustaría seguir viendo la misma ya que igual tengo el LiveReload.
