What service can create such previews?

Question

Presentations

I came across such cool previews for my projects that are posted in the portfolio.

Is there a service that generates such a picture or people in photoshop do it?

Answer 1

atmpl.ru/test/responsive/check-the-site-for-adapta... here you can write the url of your site and then screenshot the result
But if you need a really working example ... then this is done on frames ... but the display of each resolution is placed in a picture with a transparent PNG on which a hole is exactly what the iPhone iMac iPad MacBook can even do on Nokia Asha

Answer 2

I use it!
ami.responsivedesign.is