When creating a website with WordPress, the very first thing you need to do after installing the core WordPress system is installing a theme. With a theme, you can create a unique WordPress-based website. Sometimes, when browsing the web, you stumbled on a WordPress site that has an appealing interface and you are curious about the theme it is using.
There are several ways to figure out a theme used by a website but first, you need to make sure that the website is built with WordPress. You can use tools like Builtwith to figure out a technology used by a website, including the CMS.
After knowing that the website you want to check its theme uses WordPress as its CMS, you can try the following methods to figure the theme it uses.
Checking the WordPress theme using WhatRuns
WhatRuns is a browser extension that allows you to effortlessly check the theme used by a WordPress site. In addition, you can also check the plugins the website you checking are using. WhatRuns is available for Google Chrome and Firefox.
After installing the WhatRuns extension on your browser, you will see its icon on the icon bar of your browser. Simply visit the website you want to check its theme and click the WhatRuns icon on the icon bar.

As you can see on the screenshot above, the website we are checking (https://themes.artbees.net) uses the Jupiter X theme.
Checking the WordPress theme using IsItWP
IsItWP is an online tool that you can use to check the theme and plugins used by a WordPress theme. Simply visit the IsItWp website and type the URL of the website you want to check its theme and click the ANALYZE WEBSITE button.

Wait until IsItWP is done analyzing the website. Once done, scroll down to the WordPress Theme Details section to check the theme used by the website.

Checking the WordPress theme manually
If you don’t trust two tools above for a privacy issue, you can also use a manual method to check the WordPress theme a site is using. First, visit the website you want to check its theme. Once the website is fully loaded, view page the page source. You can right-click anywhere on the website and select View Page Source or simply press the Ctrl+U keys on the keyboard (Chrome and Firefox).

Search for wp-content/themes
line. The phrase/word after the “themes” word on this line is the name of the theme a website is using.

You can click on the URL in this line to open the style.css file to figure the detailed information about the theme such as the author, version, and official website. Typically, it would look something like the following.
