Can Screaming Frog Crawl Javascript?

Yes, Screaming Frog can crawl JavaScript to effectively capture rendered HTML, including critical elements such as page titles and canonical tags, making the content indexable by search engines like Googlebot. It uses a Chrome-based crawler to render and interact with JavaScript, similar to how a real browser or Googlebot would, ensuring the accuracy of the rendered page content. Screaming Frog can also mimic different user-agents to understand how a web page appears to various crawlers. Additionally, it respects the robots.txt directives and can handle custom timeout settings to ensure complete and efficient crawling of web apps, particularly those built with JavaScript frameworks like React. Furthermore, it allows for exporting crawled data, which can be useful for analysis in tools like Google Search Console. Screaming Frog’s capabilities include capturing raw HTML and rendered HTML, providing a comprehensive view of how a website’s content is presented and indexed. CSS and JavaScript resources are essential for rendering pages correctly, and Screaming Frog can take screenshots during the crawl to visually verify how pages appear post-rendering.