Keyword Surfer is a completely free Chrome extension built by the team behind Surfer SEO. Once installed, it displays estimated monthly search volume for any term you search in Google, right in the search bar as you type. The results page also shows a sidebar with related keyword suggestions and their volumes, estimated traffic for the top-ranking pages, and word count data. All of this is available at no cost, which makes it a remarkable amount of free functionality.
The in-SERP data is particularly useful for quick triage. Before you invest time in a full keyword analysis, you can search for a topic in Google and immediately see whether the volume is worth pursuing, which of the top-ranking pages is getting the most estimated traffic, and what related terms you might want to consider. It turns a standard Google search into a rapid research checkpoint without having to switch tabs or open a separate tool.
The main caveat is accuracy. The search volume data in Keyword Surfer is an estimate based on third-party data rather than direct Google data, and I’ve found it can diverge noticeably from Semrush or Ahrefs figures, particularly for low-volume or niche terms. The word count and traffic estimates for top-ranking pages are also approximations. For a free tool, this is entirely forgivable, and the convenience factor is genuinely high. If you’re already considering subscribing to Surfer SEO for content optimisation, Keyword Surfer makes a compelling introduction to what the broader platform offers. But even as a standalone free extension, it earns a place in your browser.