It is not a piece of news any longer that many people use smartphones and tablets to visit your website. The question is how to test the website to be compatible with mobile devices? Fortunately there are tools which can help with that.
1. Google Mobile-Friendly test. This tool asks for your web page URL and runs number of tests over it. After several seconds it will give you recommendations on how can you improve your site’s code to become more compatible with mobile devices.
2. In case you build your site is based on WordPress, you can use build in tool which is located at
Appearance > Customize. Here in the left bottom corner there are buttons which will switch view between desktop, tablet and smartphone modes:
3. One more tool from Google is Resizer. It is pretty much like the previous one, but allows to test websites whenever they are WordPress-based or not.
These tools are very basic, but allows to test your website quickly which is valuable when you have a lot of pages to check.