Finding SEO Chrome extensions is easy. Deciding which few earn a permanent spot is the part nobody helps you with.

Install counts do not settle it. SEOquake and MozBar each sit at roughly a million users. Their ratings are 4.5 and 3.3. Same reach, very different verdict from the people who use them daily.

This list covers 20 extensions grouped by the job they do. Each entry says what the tool is good at, what it will not do, who should bother installing it, and links straight to its official Chrome Web Store listing.

What Are the Best SEO Chrome Extensions?

The best SEO Chrome extensions are Detailed SEO Extension for on-page analysis, Ahrefs SEO Toolbar for SERP and link metrics, Redirect Path for HTTP status checks, and Keywords Everywhere for search volume data. Most SEO professionals need four to six extensions covering on-page, technical, keyword, and competitor checks. Installing more than that slows Chrome without adding capability.

The 20 Best SEO Chrome Extensions, Compared by Use Case and Cost

Every extension below was checked against its Chrome Web Store listing and its developer’s own site in September 2026. Free tiers move often here, so the pricing column states the model rather than a figure, and anything a developer keeps behind a login is noted rather than estimated. Names match how each extension appears on the Chrome Web Store, so you can find the right one and avoid lookalike copies.

1. Detailed SEO Extension

What it does: Pulls every on-page element of a URL into a single panel: title, meta description, canonical, robots directives, headings, schema, and hreflang.

Key features: Heading outline with visual indentation, structured data viewer, duplicate content check, one-click handoff to Ahrefs, Moz or Semrush, X-Robots header checking, Googlebot user-agent switching, People Also Asked extraction, and link and image export to CSV.

Pricing: Free, with no account required. Ahrefs acquired Detailed in September 2025 and its founder confirmed at the time that the extension and all existing functionality stay free, with any future premium features being additions rather than paywalls around what already works.

Who should use it: Everyone. At 600,000 users and a 4.9 rating it is the closest thing to a default install in this category, and it replaces four or five single-purpose extensions on its own. It gives you nothing on backlinks or keyword volume, so it is a starting point rather than a full stack. Worth knowing that it and the Ahrefs SEO Toolbar below now come from the same company, and the store listing now shows Ahrefs as the publisher.

Install: Add Detailed SEO Extension to Chrome

2. Keyword Surfer

What it does: Injects search volume, CPC and related keyword suggestions directly into the Google results page, alongside word count and estimated traffic for each ranking URL.

Key features: Volume data in the search bar as you type, overlap percentages against your seed term, country switching for region-specific data, keyword collections, CSV export, and word counts for the top ten results. It also surfaces data inside Google Docs.

Pricing: Free, built by Surfer SEO as a lead-in to their paid platform.

Who should use it: Content writers and strategists doing keyword work inside the SERP rather than a separate tool. The volume figures are directional, so treat them as a starting shortlist rather than a forecast.

Install: Add Keyword Surfer to Chrome

3. SEOquake: On-Page SEO Checker

What it does: Runs an on-page audit of the page you are viewing and overlays SEO metrics on every organic result.

Key features: A 28-point on-page check, SERP overlay with per-result metrics, downloadable SERP reports, keyword density analysis, internal and external link breakdown, and a compare-URLs view.

Pricing: Free. Owned by Semrush, and some features push you toward a Semrush account.

Who should use it: Generalists who want a lot of numbers on screen at once. Semrush rebuilt the extension in September 2026 and raised the on-page checks from 22 to 28, so older reviews complaining about a dated interface describe a version that no longer exists. It is still dense, and few free tools export a full SERP report the way it does.

Install: Add SEOquake to Chrome

4. Ahrefs SEO Toolbar

What it does: Adds Ahrefs link and traffic metrics to Google results and gives an on-page report for whatever URL you are viewing.

Key features: Domain Rating and URL Rating in the SERP, estimated organic traffic and keyword counts per result, broken link checker, redirect tracer with full HTTP headers, country-specific SERP positions, and a side-by-side view of HTML versus rendered metadata.

Pricing: Free tier covers on-page reports and the redirect tracer. Link and traffic metrics require a paid Ahrefs subscription.

Who should use it: Anyone already paying for Ahrefs. Without a subscription, the free features are useful but duplicated by Detailed SEO Extension and Redirect Path, and it adds noticeable load time on heavy pages.

Install: Add Ahrefs SEO Toolbar to Chrome

5. SEO Minion

What it does: Bundles the most common daily checks into one menu: on-page analysis, broken link scanning, SERP preview, and hreflang validation.

Key features: Highlights links by status and by nofollow or dofollow attribute, previews how a title and description will render in results, simulates Google searches by location, and extracts People Also Ask questions into an expandable tree.

Pricing: Paid. Since June 2023, SEO Minion works only as an add-on to a paid Keywords Everywhere plan, Silver or higher, and its former free features were removed. Many roundups still list it as free, and recent store reviews are largely from users discovering the change after installing.

Who should use it: People already paying for Keywords Everywhere, for whom it comes at no extra cost. For everyone else, Detailed SEO Extension covers most of the same on-page checks for free, and Check My Links handles broken links.

Install: Add SEO Minion to Chrome

6. Redirect Path

What it does: Flags the HTTP status of every page you load and shows the full journey a URL took to get there.

Key features: Colour-coded 301, 302, 404 and 500 alerts in the toolbar, full server header inspection, and detection of client-side redirects that server logs miss, including meta refresh and JavaScript redirects.

Pricing: Free, built by Ayima.

Who should use it: Anyone doing migrations, audits or link reclamation. It runs passively, so it catches redirect problems on sites you were not even auditing. It does nothing outside redirects, which is exactly why it stays installed. Pair it with proper technical SEO services when the pattern it surfaces turns out to be site-wide.

Install: Add Redirect Path to Chrome

7. Link Redirect Trace

What it does: Traces every hop in a redirect chain and reports what happens to link equity along the way.

Key features: Complete hop-by-hop chain, rel attribute reporting for nofollow, sponsored and UGC, robots.txt and canonical status per hop, HTTP header detail, and a flag when a redirect target no longer matches the original topic.

Pricing: Free extension. Deeper link risk data requires a LinkResearchTools account.

Who should use it: Link builders auditing acquired links, and anyone cleaning up a chain of legacy redirects. It goes further than Redirect Path on link attributes, and both are worth having. The extension hasn’t been updated since mid-2024, which hasn’t affected the core trace but is worth noting.

Install: Add Link Redirect Trace to Chrome

8. SEO Search Simulator by Nightwatch

What it does: Runs a Google search as if you were physically in a chosen city, region or country, without a VPN or proxy.

Key features: Location targeting down to city level, language and device selection, saved searches you can rerun, and a clean unpersonalised result set that ignores your own search history.

Pricing: Free.

Who should use it: Local SEOs verifying map pack positions, and international teams checking whether a page ranks in its target market. Every query is typed manually, and nothing is tracked over time, so it settles a question rather than monitoring one. It is still the fastest way to end a “but it ranks for me” argument with a client.

Install: Add SEO Search Simulator to Chrome

9. Wappalyzer

What it does: Identifies the technology behind any site: CMS, ecommerce platform, analytics, tag managers, CDNs, frameworks, and hosting.

Key features: Instant stack detection, technology change alerts, and export of detected technologies across lists of sites. The paid Plus tier adds company name, size, and industry, email addresses, phone numbers, social profiles, and page metadata inside the extension itself.

Pricing: The browser extension is free. Plus is a paid upgrade for company and contact data.

Who should use it: Consultants scoping a technical audit, and agencies qualifying prospects. Knowing a site runs headless Next.js rather than WordPress changes the shape of a recommendation before you have written a word.

Install: Add Wappalyzer to Chrome

10. HeadingsMap

What it does: Generates a document outline of every heading on a page, from H1 through H6, in hierarchy order.

Key features: Visual tree of the heading structure, warnings for skipped levels and missing H1s, HTML5 sectioning element support, and export of the outline as text.

Pricing: Free.

Who should use it: Content editors and accessibility-conscious teams. Broken heading hierarchy is an easy problem to miss, because a page can look perfectly organised on screen while its markup is not.

Install: Add HeadingsMap to Chrome

11. View Rendered Source

What it does: Shows the raw HTML the server delivered next to the DOM after JavaScript has executed, and highlights the difference.

Key features: Side-by-side raw and rendered comparison, a dedicated diff view of what JavaScript added or changed, and rendering statistics for the page.

Pricing: Free.

Who should use it: Anyone auditing a React, Vue or Angular site. If your canonical tags, internal links or main content only exist after JavaScript runs, this is how you prove it in ten seconds instead of arguing about it for a week. It is a small, single-developer tool that has not been updated since 2023, but the comparison it performs has not needed to change.

Install: Add View Rendered Source to Chrome

12. Hreflang Checker

What it does: Reads the hreflang annotations declared on the page you are viewing and lists each alternate URL with its language and region code.

Key features: A per-page view of every hreflang alternate, so a malformed code, a missing x-default or an alternate pointing at the wrong URL is visible at a glance.

Pricing: Free to install.

Who should use it: International SEO teams. Hreflang fails silently, which is what makes it dangerous. Google’s own documentation requires return tags on every alternate page, and a missing one means the annotation is ignored. It checks one page at a time, so open each alternate it lists and confirm it links back. The long-standing Adapt Worldwide Hreflang Tag Checker that many older guides recommend no longer appears on the Chrome Web Store, so links to it lead nowhere.

Install: Add Hreflang Checker to Chrome

13. Check My Links

What it does: Crawls every link on the current page and highlights each one as valid or broken.

Key features: Colour-coded link status on the live page, a summary count of valid and broken links, and copy-to-clipboard export of the broken ones.

Pricing: Free.

Who should use it: Outreach teams running broken link building, and editors auditing resource pages. On very large pages the rapid-fire requests can trigger rate limiting, so run it one section at a time when a page carries hundreds of links. The extension is now published by SelectorsHub Tech Private Limited rather than its original developer. It still does the same job, but a change of owner is exactly when permissions and data practices can change, so check the listing’s permissions before you install.

Install: Add Check My Links to Chrome

14. Similarweb – Website Traffic, AI Traffic & SEO Checker

What it does: Estimates a site’s traffic volume, sources, geography and engagement without needing access to its analytics.

Key features: Monthly visit estimates, traffic source split across direct, search, social and referral, top referring and outgoing sites, audience geography, and similar site suggestions.

Pricing: Free extension with limited depth. Full data requires a Similarweb subscription.

Who should use it: Competitive researchers and anyone sizing a market. Treat the numbers as directional. Accuracy falls off on lower-traffic sites, which describes most of the competitors a mid-market business actually worries about.

Install: Add Similarweb to Chrome

15. MozBar

What it does: Displays Domain Authority and Page Authority for every result on a search page and for whatever site you are browsing.

Key features: DA and PA in the SERP, Spam Score, linking root domain counts, on-page element highlighting, and custom searches by engine, country and city.

Pricing: Free with a Moz account. Several features that used to be free now require a Moz Pro subscription.

Who should use it: People who work with clients or teams who already speak in DA terms. Moz rebuilt it as MozBar V5 in July 2026, and at 3.3 it still carries one of the lowest ratings of any extension here. The free tier has narrowed considerably, so judge it on what it gives you today rather than what it gave in 2020.

Install: Add MozBar to Chrome

16. Keywords Everywhere – Keyword Tool

What it does: Shows search volume, CPC and competition data across Google, YouTube, Amazon, Bing, eBay, Etsy and several other platforms.

Key features: Volume and trend data in the search bar and results page, related and people-also-search-for keyword lists with metrics, historical trend charts, and bulk keyword upload with metrics returned in CSV.

Pricing: Paid only, on a credit model. Plans run from Bronze at 100,000 credits through to Platinum at 8,000,000 credits, with seat counts rising by tier. A Silver plan or higher also unlocks SEO Minion.

Who should use it: Researchers working across more than one platform. Nothing else puts Amazon and YouTube volume next to Google volume in the same interface, which matters for ecommerce and video-led content marketing services.

Install: Add Keywords Everywhere to Chrome

17. SEO Extension [Metrics, Backlinks, On-Page]

What it does: Mangools’ extension surfaces authority and difficulty metrics on the page you are viewing and across search results, plus on-page and page speed checks.

Key features: Without signing in you get domain trends, SERP tools, context menu integrations and unlimited on-page SEO and page speed checks. A free Mangools account gives you the full domain stats, meaning Domain Authority, Page Authority, Citation Flow and Trust Flow, along with rank tracking, keywords and backlinks for either a domain or an exact URL.

Pricing: Free to install. The headline metrics need a Mangools account, but a free account is enough. No paid plan is required for DA, PA, Citation Flow or Trust Flow.

Who should use it: Anyone who wants authority metrics without paying for Moz Pro or Ahrefs. The free account tier makes it one of the better-value entries on this list, and the on-page and page speed checks work before you sign up for anything. Search the store for “Mangools” rather than the listing’s generic name, which several unrelated extensions share.

Install: Add Mangools’ SEO Extension to Chrome

18. Hunter – Email Finder Extension

What it does: Returns the email addresses Hunter has indexed for the domain you are browsing, with the public URL each one was found on.

Key features: Domain search from the toolbar, email finder by a person’s name, filters for department and for generic versus personal addresses, and job title, phone number and social profiles attached to a contact wherever Hunter holds them. Verified addresses are marked and the rest carry a confidence score. Contacts save to a leads list and sync to Salesforce, HubSpot, Pipedrive, Zoho and more than a hundred other applications.

Pricing: Free to install, and a free Hunter account is required. That account gives 50 credits a month, with verification at half a credit per address and CSV export capped at ten emails per domain.

Who should use it: Link builders and digital PR teams who need a named contact rather than a contact form. It does not read the page you are on. It returns what Hunter’s crawlers already indexed for that domain, so a newly launched site can return nothing while its team page sits open in front of you. It finds no addresses on LinkedIn or other social profiles either, and catch-all domains cannot be verified, which is where most bounces come from.

Install: Add Hunter to Chrome

19. Tag Assistant

What it does: Confirms that Google Tag Manager, the Google tag, GA4, Google Ads conversion and Floodlight tags fire the way you configured them.

Key features: A side panel listing the Google tags on the current page, and a Troubleshoot button that opens a full debug session: every event in fire order, the gtag() call or dataLayer.push() behind each one, the hits sent with their parameters, a live data layer view, and a consent tab covering ad_storage, ad_personalization, ad_user_data and analytics_storage. The extension adds tag detection inside iframes and debugging of pop-ups, which tagassistant.google.com on its own cannot do.

Pricing: Free. Preview mode in Tag Manager needs a signed-in Google account.

Who should use it: Anyone whose SEO reporting rests on numbers this tool can check. Install the listing published by Google Ireland, Ltd., linked below. Google deprecated the Legacy extension, then merged Legacy and Companion back into that original listing, and Companion is the one being retired, so older guides point you at the wrong install. It covers Google’s own tags only and AMP is unsupported. This is measurement QA rather than SEO diagnostics, and it belongs here for one reason: when conversion tracking breaks, every SEO report built on top of it is wrong and nothing else in your toolbar will say so.

Install: Add Tag Assistant to Chrome

20. Wayback Machine

What it does: Shows you what a page looked like on a past date, and saves the page you are on into the Internet Archive.

Key features: Oldest, Newest and a calendar overview of every capture held for a URL, all reachable by right-clicking a page or a link. The toolbar icon carries a snapshot count and the date of the last save. When a page returns a 4xx or 5xx error the extension checks automatically for an archived copy. A sunburst diagram maps the domain and a URL list shows what else the archive holds under the same site.

Pricing: Free, from the Internet Archive. Save Page Now works while logged out.

Who should use it: Anyone auditing a migration, a redesign or an unexplained traffic drop. Opening the old template next to the new one settles in a minute an argument that would otherwise run for a week, and on an expired domain it is the only way to see what the content was before you value a link pointing at it. Coverage is not guaranteed though. Robots exclusions and owner requests remove pages, and when the exact date is not held the archive serves the nearest capture it has. A capture dates a state on or near that day. It does not prove when the change happened.

Install: Add Wayback Machine to Chrome

How to Choose SEO Chrome Extensions Without Slowing Down Chrome

Every installed extension runs code on the pages you visit, and many request permission to read and change site data. Ten of them running at once is a measurable performance cost and a real privacy surface. Five criteria decide what stays installed.

Cover jobs, not brands. On-page inspection, technical and redirect checks, keyword data, and competitor context. One strong extension per job beats four overlapping ones, and overlap is the main reason toolbars get crowded.

Check what the free tier includes today. Several tools here have narrowed or removed their free features. MozBar and Ahrefs SEO Toolbar both gate their most useful metrics behind a paid account now, and SEO Minion dropped its free tier entirely. A roundup written a few years ago will tell you otherwise.

Prefer extensions that work without an account. Several of the strongest tools here run the moment you install them, with no signup and no login. That matters more than it sounds when you are auditing on a client machine or a colleague’s laptop.

Read the permissions and the publisher before installing. An extension that reads all site data is reading your email, your analytics and your client dashboards too. Install from the Chrome Web Store only, and check the developer name matches the company you think built it. Extensions change hands: Detailed SEO Extension now belongs to Ahrefs and Check My Links to SelectorsHub. A recommendation that was sound when it was written can point at a tool with a different owner today, which is why the check belongs at install time.

Disable rather than uninstall. Chrome lets you toggle extensions off. Keep the specialist tools disabled and switch them on for the audit that needs them, which keeps your browser fast without losing the tool.

One gap worth knowing about. Nothing on this list measures Core Web Vitals, and that is deliberate rather than an oversight. Page experience is the one SEO check that moved out of extensions entirely, and the next section explains where it went.

Extensions are diagnostic instruments. They tell you a page has a problem. Deciding which problems to fix first, and in what order, is what a proper SEO audit does that no toolbar can.

What Happened to the Web Vitals Extension, and Where Core Web Vitals Live Now

Until 2024 the Web Vitals extension was a standard install on any SEO’s toolbar. It showed LCP, INP and CLS for whatever page you were on, with a coloured badge telling you at a glance whether the page passed. For page experience work it was the fastest check available, and on a list like this one it would have been a strong contender.

It is retired. Google ended support on 7 January 2025 and archived the code the following month. If it is still sitting in your toolbar it may keep working, but it will not be updated and features can break without notice.

The functionality moved into Chrome DevTools. Open DevTools, go to the Performance panel, and the live metrics view reports LCP, INP and CLS as you interact with the page, alongside field data from real Chrome users where Google holds it for that URL. It also surfaces the LCP element, the phase breakdown behind each metric and an interaction log, none of which the extension ever did. The replacement is better than the thing it replaced.

Lighthouse followed the same path. The Lighthouse Chrome extension technically still exists, but Google’s own documentation now tells you to use DevTools instead: the extension cannot audit local sites or pages behind a login, and DevTools can. Lighthouse also runs from PageSpeed Insights, the command line, or as a Node module inside a CI pipeline.

One correction worth making if you learned this before 2024. FID is no longer a Core Web Vital. Google replaced it with INP on 12 March 2024 and removed it from Search Console the same day. Any tool or article still reporting FID as a Core Web Vital is working from a retired spec.

The practical version. For a quick score on a live URL, use PageSpeed Insights. For debugging a specific page, open the DevTools Performance panel. For monitoring across a site, use the Core Web Vitals report in Search Console. A handful of extensions still show a page speed number, Mangools’ among them, but they are surfacing PageSpeed Insights data rather than measuring anything in your browser. None of this needs an extension any more.

Which SEO Chrome Extensions Actually Help With AI Search Visibility

None of them measure AI visibility directly. No Chrome extension currently reports whether ChatGPT, Perplexity, Gemini or Google AI Overviews cite your brand, and any tool claiming otherwise is estimating.

What these extensions can do is confirm the conditions that make citation possible. Three of them earn their place here.

Detailed SEO Extension shows your structured data. Schema markup is how a page states its entities explicitly, and explicit entities are easier for a language model to attribute correctly.

View Rendered Source tells you whether your content exists in the raw HTML. Crawlers behind AI answer engines handle JavaScript less consistently than Googlebot does. Content that only appears after rendering may never be seen at all.

HeadingsMap exposes whether your page answers questions in a clean hierarchy. AI systems lift self-contained passages. A page with a logical heading structure and a complete answer under each heading is far more liftable than a wall of prose.

Measuring actual citation frequency is a different job. It needs platform-level monitoring rather than a browser toolbar, which is where AI SEO services pick up from where the extensions stop.

The Extensions Worth Installing First

Start with Detailed SEO Extension and Redirect Path. Both are free, neither needs an account, and between them they answer most of the questions that come up in a normal working day.

Add three more based on what you actually do. Keyword Surfer if you write content. View Rendered Source if you work on JavaScript-heavy sites. One authority tool for competitive context, and Mangools’ extension is the cheapest route in because a free account gives you DA, PA, Citation Flow and Trust Flow. If your team already pays for Ahrefs or Moz, use their toolbar instead and skip the extra login.

That is five extensions covering the full range of routine checks. Everything else on this list is situational: install it for the project that needs it, then switch it off again.