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One of the most integral parts of developing a website is to test it in different screen resolutions. There are several ways to go about it but none of them are faster and smoother than TestSize. A simple web app that lets you view site in different resolutions.

Simply enter the URL and select the window size you want to test your webpage in, ranging from 240 x 320 to 1920 x 1024. You can also enter a custom width and height to test a webpage in any specific settings. The actual webpage is then displayed below for your testing; unlike some other apps, TestSize lets you test the actual webpage instead of just providing a screenshot. You can also use keyboard shortcuts to quickly change the size of the window.

view site in different resolutions


  • Test any webpage in any window size.
  • Select a standard size or enter your own.
  • Use keyboard shortcuts to quickly change the settings.
  • No registration required.
  • Similar tool: and you might also want to try other tests that we reviewed:


      – Test if your site is blacklisted.


      – Test if your site is being hacked and exploited by hackers.


    – Test your site in different browsers.

Visit TestSize @

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