Best SEO Browser Extensions for Chrome & Firefox

Updated October 2026 · 1 min read

A good SEO extension answers questions while you browse: what is this page's title, are its headings sane, where do its links go? The best ones are small, fast and free. Here is the short list, by job.

Page analysis in one click

Detailed SEO Extension (Chrome) shows a page's title, meta description, headings, canonical and schema in one clean panel — the fastest way to sanity-check your own pages. MozBar (free tier) adds domain authority and link metrics to search results, useful for sizing up competition. For a deeper automated check, our SEO Analyzer runs in the browser with no install at all.

Links, redirects and headers

Check My Links highlights broken links on any page in seconds — invaluable before publishing a resource page. Redirect Path flags redirect chains and status codes as you browse. If you would rather not install anything, Redirect Checker does the same job from a web page.

Keyword and SERP helpers

Keywords Everywhere (freemium) shows search volume and related keywords beside Google results. SEO Minion checks on-page SEO, broken links and SERP previews from one icon. Treat the volume numbers in free extensions as estimates, not gospel — they come from third-party models, not Google.

Extensions to skip

Skip extensions that promise "automatic SEO scores" for your site without explaining the score, extensions that inject ads or affiliate links into pages, and anything asking to "read and change all your data on all websites" without a clear reason. An SEO extension needs the current tab — it does not need your browsing history.

Frequently asked questions

Do SEO extensions slow down my browser?

A few lightweight ones will not. A dozen heavy ones will — keep it to three or four you actually use, and disable the rest.

Can extensions replace a real SEO audit?

No. They check one page at a time, in your browser. A full audit needs a crawl of the whole site — see our SEO audit guide.

Are these available for Firefox too?

Most of the big ones (MozBar, Detailed, SEO Minion) have Firefox versions; a few are Chrome-only. The web-based tools on this site work in every browser.