The Best Free SEO Chrome Extensions in 2026 (We Tested Them)

Most "best SEO chrome extension" roundups are just affiliate lists with screenshots. Every tool gets called "powerful" and "intuitive" and nobody tells you when you'd actually reach for one over another. This isn't that.

I've used all of these on real client work. Here's what each one is actually good for, what it misses, and who should have it installed.

1. SEO Scout Extension — Best for On-Page Audits While Browsing

Our own extension, so take this with appropriate salt — but the use case is genuinely different from most tools here. The SEO Scout extension is built specifically for checking a live page you're already on: meta tags, heading structure, schema markup, Open Graph tags, robots directives, and Core Web Vitals data all in one popup.

What I find myself using it for most: quick competitor audits. When I land on a competitor's page and want to see exactly how they've structured their titles, headings, and schema without opening DevTools, one click does it. Completely free, no account, works on any URL.

Install SEO Scout Extension →

2. Detailed SEO Extension — Best Free All-Rounder

Built by Glen Allsopp (Viperchill), the Detailed SEO extension is probably the most-recommended free SEO extension for good reason: it surfaces a lot of data cleanly and there's no upsell in sight. You get page title, meta description, canonical, robots, structured data, external/internal links, word count, and more in a tab-based popup.

It's especially good for quickly scanning pages you're considering for link building. One click tells you the canonical, whether the page is indexed, and what structured data is on it. No account, no tracking. The extension lives up to its name.

3. Keyword Surfer — Best for SERP Keyword Research

Keyword Surfer is the extension you want open while you're doing keyword research. As you type into Google, it injects estimated monthly search volumes next to every result in the SERP and shows a sidebar with related keywords, similar terms, and volume data for over 70 countries.

The data isn't Ahrefs-accurate — no free tool is — but it's good enough for quickly sorting "this has volume" from "nobody searches this." The content editor feature (available in the full app, not just the extension) is where it gets genuinely useful for content planning.

4. Redirect Path — Best for Technical Audits

Redirect Path does one thing: it shows you every redirect and HTTP status code in the chain as you navigate. When you click a link and there are three redirects happening, Redirect Path shows you each hop, the status codes, and the final destination.

It's unglamorous but the number of times I've caught a client's site doing 301 → 302 → 200 chains that nobody knew about is embarrassing. This catches those. It's also useful for checking that old URLs are redirecting after migrations. Free, no account, no ads.

5. Ahrefs SEO Toolbar — Best If You Have an Ahrefs Account

I'm including this conditionally because the free tier is limited. If you have an Ahrefs account, the toolbar extension is excellent: DR, backlink count, referring domains, traffic estimates, and keyword data overlaid directly on Google SERPs. It turns every search into a mini competitive landscape report.

Without a paid Ahrefs account, you get far less. Don't install this hoping it replaces Keyword Surfer for free keyword data — it doesn't.

What to Skip

MozBar: Once the default choice for quick DA checks. Still works but feels dated in 2026. The interface hasn't changed much in years and Moz's data on domain authority feels less reliable than it used to. Use it if you're already in the Moz ecosystem; otherwise, skip it.

SEOquake: Powerful but cluttered. The toolbar injects metrics onto every SERP result which becomes noise after a while. Fine for specific deep-dive work, less useful as a daily driver.

My Actual Setup

Day-to-day I have three installed: SEO Scout extension for on-page audits, Keyword Surfer for SERP research, and Redirect Path for any technical work. The Ahrefs toolbar comes out when I'm doing competitive research with client data. Detailed SEO lives in the toolbar for the days I want a clean secondary opinion.

You don't need five SEO extensions running simultaneously. Pick two that match your most common tasks and let the others stay disabled until needed. Extension bloat slows down your browser more than most people realise.

Try our free SEO tools or explore more in-depth guides.