How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Extensions solve four separate jobs. On-page and technical audits, keyword research inside the SERP, domain and backlink metrics, and link analysis. Pick by job, not by name recognition.
- Most of the useful ones are free. Detailed SEO Extension, SEO Minion, SEOquake, Check My Links, NoFollow, and the free layer of MozBar and Ahrefs SEO Toolbar cost nothing to install.
- Free tiers are often a teaser for the paid platform. MozBar shows Domain Authority for free but full link data needs Moz Pro. Ahrefs SEO Toolbar shows DR and UR for free but keyword and traffic history needs an Ahrefs account.
- Keywords Everywhere ships 18 free features, including related keywords, site metrics, and social data, and only puts search volume and CPC behind a prepaid credit system (Keywords Everywhere).
- Wappalyzer detects more than 1,000 web technologies across CMS, ecommerce, analytics, and hosting categories, useful for scoping a competitor's stack before a pitch or a migration.
- Extensions never replace a platform. They read the page you're already on. For bulk crawls, historical data, or competitor keyword gaps at scale, you still need Ahrefs, Semrush, Moz, or Screaming Frog.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Detailed SEO Extension | On-page and technical snapshot | Free | Fully free |
 SEO Minion | Broken links, hreflang and SERP preview | Free | Fully free |
 SEOquake | Full on-page audit and SERP overlay | Free | Free (Semrush login for full data) |
 META SEO Inspector | Meta tag and Open Graph checks | Free | Fully free |
 Keyword Surfer | Quick keyword volume in Google | Free | Fully free, no sign-up |
 Keywords Everywhere | Cross-platform keyword data | Free features; prepaid credits for volume and CPC | 18 free features |
 MozBar | Domain Authority and Page Authority | Free | Free toolbar (Moz Pro for full data) |
 Ahrefs SEO Toolbar | DR/UR and broken-link checks | Free | Free toolbar (Ahrefs account for full data) |
 SimilarWeb | Traffic estimation | Free (limited) | Free, limited depth |
 Wappalyzer | Tech stack detection | Free core lookup | Free core lookup (Plus plan extra) |
 Check My Links | Broken link scanning | Free | Fully free |
 NoFollow | Link attribute visibility | Free | Fully free |
 Redirect Path | Redirect chain tracing | Free | Fully free |
 Hunter | Outreach email finding | Free plan (25 searches/month) | 25 searches/month free |
 Google Tag Assistant | Tracking tag debugging | Free | Fully free |
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
What makes an SEO Chrome extension worth installing?
The best SEO Chrome extensions in 2026 solve four jobs without leaving the browser: on-page and technical audits, keyword research inside the SERP, domain and backlink metrics, and link analysis. Extensions like Detailed SEO Extension, MozBar, Ahrefs SEO Toolbar, and Keywords Everywhere cover these free or near-free, though none replace a full platform for deep data or bulk crawls.
This guide skips the flat, unordered list of 20 logos. Instead, we group the extensions people actually recommend by the job they do, show what's genuinely free versus what's a teaser for a paid platform, and give you an original comparison table so you can pick two or three instead of installing all of them.
A worthwhile SEO Chrome extension saves a specific, repeated step, like checking meta tags, tracing a redirect, or seeing search volume, without opening a separate tool. The best ones are narrow by design: they read the page you're already viewing and surface one type of data cleanly, rather than trying to cram a whole SEO suite into a toolbar. If an extension asks for broad permissions it doesn't need, or hasn't been updated in over a year, that's a reason to skip it; check the "last updated" date on its Chrome Web Store listing before installing anything.
Best SEO Chrome extensions compared
Fifteen extensions, sorted by the job each one does best. Treat the free-tier column as a starting point, since vendors change plans and limits without much notice, so always confirm current terms on the vendor's own site.
Starting priceFree
Free planFully free
Detailed SEO Extension is a one-click summary of title length, meta description, headings, canonical tag, robots directives, and structured data for the current page. It's free with no account required, which makes it the fastest first check on any URL.
What we like- One-click summary of title length, meta description, headings, canonical, robots directives and structured data
- Free with no account required
- The fastest first check on any URL
Watch out for- Overlaps heavily with SEO Minion and SEOquake, so run one, not all
- Reads one page at a time, so it does not replace a full platform for bulk crawls
Starting priceFree
Free planFully free
SEO Minion goes further: it checks for broken links, audits hreflang tags, simulates a SERP preview, and runs a Google search from a chosen country and language so you can see how a page ranks outside your own location. Also free.
What we like- Checks broken links and audits hreflang tags
- Simulates a SERP preview
- Runs a Google search from a chosen country and language
Watch out for- Overlaps with the other on-page auditors
- Reads one page at a time, so it does not replace a full platform for bulk crawls
Starting priceFree
Free planFree (Semrush login for full data)
SEOquake, built by Semrush, overlays SEO metrics directly on Google's results, including word count, keyword density, and internal and external link counts, and can export a page audit to CSV. The extension itself is free; connecting it to a Semrush account unlocks more site-level data.
What we like- Overlays word count, keyword density and internal and external link counts on Google's results
- Exports a page audit to CSV
- Built by Semrush
Watch out for- More site-level data needs a Semrush account
- Overlaps with the other on-page auditors
Starting priceFree
Free planFully free
META SEO Inspector focuses narrowly on meta tags, heading hierarchy, and Open Graph and Twitter card data, useful for a fast pre-publish check before a page goes live.
What we like- Shows meta tags, heading hierarchy, and Open Graph and Twitter card data
- Handy as a fast pre-publish check
Watch out for- Narrow focus on meta, heading and social tags
Starting priceFree
Free planFully free, no sign-up
Keyword Surfer shows estimated monthly search volume and CPC next to Google's results and inside the search box as you type, covering more than 70 countries. It's completely free with no sign-up.
What we like- Shows estimated monthly search volume and CPC next to Google's results and in the search box
- Covers more than 70 countries
- Completely free with no sign-up
Watch out for- Not built for clustering thousands of terms or exporting bulk lists
Starting priceFree features; prepaid credits for volume and CPC
Free plan18 free features
Keywords Everywhere is broader: its free layer alone covers 18 features, including related keywords, People Also Search For data, YouTube and Amazon insights, and hashtag suggestions, with no paid plan required (Keywords Everywhere). Search volume, CPC, and 12-month trend history run on a prepaid credit system rather than a subscription, and the same overlay works across Google, YouTube, Amazon, Bing, and Google Trends, not just web search.
What we like- Free layer covers 18 features, including related keywords and People Also Search For data
- Overlay works across Google, YouTube, Amazon, Bing and Google Trends
- Prepaid credits rather than a subscription
Watch out for- Search volume, CPC and 12-month trend history run on prepaid credits
- Not a replacement for bulk keyword research
#7
MozBar
Best for: Domain Authority and Page Authority
Visit moz.com
Starting priceFree
Free planFree toolbar (Moz Pro for full data)
MozBar overlays Moz's Domain Authority and Page Authority scores on any page or SERP, plus a quick view of a page's link profile. The toolbar itself is free; full backlink exploration needs a Moz Pro subscription.
What we like- Overlays Domain Authority and Page Authority on any page or SERP
- Quick view of a page's link profile
Watch out for- Full backlink exploration needs a Moz Pro subscription
- Domain Authority is a third-party metric, not a Google ranking factor
Starting priceFree
Free planFree toolbar (Ahrefs account for full data)
Ahrefs SEO Toolbar shows Domain Rating (DR), URL Rating (UR), and estimated organic traffic for any page, along with a built-in broken-link checker and redirect tracer. The toolbar is free to install; a free Ahrefs Webmaster Tools account covers your own verified sites, and a paid plan covers everyone else's.
What we like- Shows Domain Rating, URL Rating and estimated organic traffic for any page
- Built-in broken-link checker and redirect tracer
- Free Ahrefs Webmaster Tools account covers your own verified sites
Watch out for- Data on other people's sites needs a paid Ahrefs plan
- On-demand lookups can be less fresh than a scheduled crawl
Starting priceFree (limited)
Free planFree, limited depth
SimilarWeb estimates a site's monthly visits, traffic sources, and top referring countries. The free layer is limited in depth and asks you to join its data-sharing panel for fuller access.
What we like- Estimates a site's monthly visits, traffic sources and top referring countries
Watch out for- Free layer is limited in depth
- Fuller access asks you to join its data-sharing panel
Starting priceFree core lookup
Free planFree core lookup (Plus plan extra)
Wappalyzer identifies more than 1,000 web technologies on any site, from CMS and ecommerce platform to analytics tags and CDN, in a single click. Free for the core lookup; the paid Plus plan adds company and contact details for the domains you scan.
What we like- Identifies more than 1,000 web technologies, from CMS and ecommerce platform to analytics tags and CDN
- One-click lookup
Watch out for- Company and contact details for scanned domains need the paid Plus plan
Starting priceFree
Free planFully free
Check My Links scans a page and highlights every link as valid, broken, or redirecting, which turns a manual link audit or a resource-page outreach check into a few seconds of work. Free for the core scan.
What we like- Highlights every link on a page as valid, broken or redirecting
- Turns a manual link audit into a few seconds of work
- Free core scan
Starting priceFree
Free planFully free
NoFollow visually marks nofollow, sponsored, and UGC links directly on the page, so you can tell at a glance whether a guest post or directory listing will pass link equity before you pitch it. Free.
What we like- Visually marks nofollow, sponsored and UGC links on the page
- Shows whether a placement will pass link equity before you pitch it
Watch out for- Single job: shows link attributes only
Starting priceFree
Free planFully free
Redirect Path, also sold under the name Link Redirect Trace, maps the full chain of redirects and HTTP status codes between a starting URL and its final destination, useful for auditing old links after a site migration. Free.
What we like- Maps the full redirect chain and HTTP status codes from a starting URL to its final destination
- Useful for auditing old links after a site migration
Watch out for- Single job: redirect and status-code tracing only
#14Hunter
Best for: Outreach email finding4.4/5 on
G2 (656 reviews, checked Oct 2026)
Visit hunter.io
Starting priceFree plan (25 searches/month)
Free plan25 searches/month free
Hunter finds and verifies email addresses tied to a domain, which speeds up outreach for guest posts, broken-link replacement, and digital PR. The free plan covers 25 searches a month.
What we like- Finds and verifies email addresses tied to a domain
- Speeds up outreach for guest posts, broken-link replacement and digital PR
Watch out for- The free plan covers only 25 searches a month
Starting priceFree
Free planFully free
Google's own Tag Assistant isn't sold as an SEO tool, but it belongs in the stack anyway: it verifies that Google Analytics, Google Ads, and Google Tag Manager are firing correctly on a page, which matters because bad tracking data leads to bad SEO decisions. It's free and maintained directly by Google. None of these extensions, including Tag Assistant, measure whether your pages get cited inside AI Overviews or chat answers; that's a separate, newer job covered in our roundup of the best tools for monitoring AI Overviews.
What we like- Verifies that Google Analytics, Google Ads and Google Tag Manager fire correctly
- Free and maintained directly by Google
Watch out for- Not an SEO tool in itself
- Does not measure citations in AI Overviews or chat answers
Which SEO Chrome extensions are best for technical and on-page audits?
Detailed SEO Extension, SEO Minion, SEOquake, and META SEO Inspector are the four most commonly recommended for on-page and technical checks, each pulling title tags, meta descriptions, canonicals, headings, and schema straight off the live page you're viewing.
Pick one, not all four. They overlap heavily, and running several at once on the same page just duplicates the same title-tag check three different ways.
Which extensions give the fastest keyword research inside the SERP?
Keyword Surfer and Keywords Everywhere are the two extensions most cited for in-SERP keyword research, both overlaying search volume and related terms directly on Google's results page.
Neither replaces a dedicated keyword research tool for clustering thousands of terms or exporting bulk lists. For that scale, see our breakdown of the best AI SEO tools, most of which include full keyword research modules these extensions only sample from.
Which extensions show domain and backlink metrics at a glance?
MozBar, the Ahrefs SEO Toolbar, SimilarWeb, and Wappalyzer are the four most common choices for sizing up a site's authority, traffic, and technology stack without leaving the page you're on.
These four answer different questions: MozBar and Ahrefs SEO Toolbar for authority and link data, SimilarWeb for traffic, Wappalyzer for what a site is built on. A competitor audit usually needs at least two of them running together. If Ahrefs itself is out of budget, our Ahrefs alternatives guide covers full platforms that ship their own browser toolbars too.
Which extensions help with link analysis and outreach?
Check My Links, NoFollow, Redirect Path, and Hunter cover the four recurring link-building tasks: finding broken links, spotting link attributes, tracing redirects, and locating outreach contacts.
If link building is a bigger part of your workload than a browser extension can carry, our guide to how to build backlinks covers the strategy these tools only support. For city-level businesses, pair the same link and authority extensions with dedicated local SEO tools for citations and Google Business Profile management, since none of the extensions above check local pack rankings.
Are SEO Chrome extensions safe to install?
Most reputable SEO extensions are safe, but every browser extension can read and sometimes modify the pages you visit, so permissions matter more than the extension's stated purpose. Before installing, check three things: who publishes it, whether that's an agency, a known SEO brand, or an anonymous developer; when it was last updated on the Chrome Web Store; and what permissions it requests. An extension that only needs to read the current tab is lower-risk than one asking for access to all your browsing data and cookies across every site. When in doubt, install from the vendor's own site link, such as Moz, Ahrefs, or Semrush, rather than searching the Chrome Web Store by keyword, since imitation extensions using similar names do occasionally appear.
How many SEO extensions should you actually run at once?
Two to four, chosen by job, is enough for most people; running ten at once slows the browser and duplicates data you already have. A workable starter stack: one on-page auditor (Detailed SEO Extension or SEO Minion), one keyword tool (Keyword Surfer or Keywords Everywhere), one authority and backlink toolbar (MozBar or Ahrefs SEO Toolbar), and one link checker (Check My Links or NoFollow). Add Wappalyzer or Hunter only when you actually need a tech-stack lookup or an outreach email, then disable extensions you're not using that week. Chrome slows down measurably once a dozen extensions are all injecting scripts into every page you load.
Mistakes to avoid
- Trusting free-tier authority scores as gospel. Domain Authority and Domain Rating are third-party metrics, not Google ranking factors. Use them to compare sites relative to each other, not as a literal ranking signal.
- Running three or four overlapping on-page auditors at once. Detailed SEO Extension, SEO Minion, and SEOquake mostly check the same things. Pick one.
- Installing from an unverified listing. Search the Chrome Web Store by the vendor's exact name, or link in from the vendor's own site, rather than clicking the first result.
- Forgetting extensions read every page you load. Review permissions occasionally, and remove anything you haven't opened in months.
- Expecting extension data to match your platform exactly. MozBar and Ahrefs SEO Toolbar sample data on demand; your dashboard inside Moz Pro or Ahrefs may show slightly different numbers depending on crawl freshness.
Frequently asked questions
What is the best free SEO Chrome extension overall?
For most people, Detailed SEO Extension is the best starting point because it checks titles, meta tags, headings, canonicals, and schema in one click with no account needed. Pair it with Keyword Surfer for quick volume data and you cover the two most common daily checks for free.
Do SEO Chrome extensions slow down my browser?
A few running at once has little effect, but a dozen active extensions injecting scripts into every page you load will noticeably slow Chrome, especially in tab-heavy sessions. Keep two to four active and disable the rest rather than leaving everything installed and running.
Are Ahrefs SEO Toolbar and MozBar data as accurate as the full platforms?
The toolbars pull the same underlying Domain Rating, URL Rating, Domain Authority, and Page Authority scores as the full platforms, but the on-demand lookup behind a single check can be less fresh than a scheduled crawl inside Ahrefs or Moz Pro. Treat toolbar numbers as a fast estimate, not a final report.
Can I use multiple SEO extensions at once?
Yes, Chrome allows any number of active extensions, but running several that check the same thing, like three different on-page auditors, just duplicates results. Group extensions by the job they do and keep one per job active.
Is Keywords Everywhere free?
Partly. Eighteen features are free, including related keywords, site metrics, and social data, according to Keywords Everywhere's own site. Search volume, CPC, and historical trend charts run on a prepaid credit system rather than a subscription, so you only pay when you pull that specific data.
What permissions do SEO Chrome extensions need, and are they safe?
Most need to read the content of the page you're viewing, since that's how they pull titles, links, and schema. Reputable extensions from known SEO brands such as Moz, Ahrefs, Semrush, and Wappalyzer are safe; the real risk is unofficial copies using similar names, so install from the vendor's own site link where possible.
Do SEO Chrome extensions work on Microsoft Edge and Brave?
Most do, since Edge and Brave are both built on Chromium and support the Chrome Web Store. A handful of extensions, including Keywords Everywhere, also publish dedicated Firefox and Edge versions directly.
What is the difference between SEOquake and MozBar?
SEOquake overlays a broader page-level audit, including word count, keyword density, link counts, and exportable reports, and is built by Semrush. MozBar focuses narrowly on Domain Authority and Page Authority scores from Moz. Many SEOs run both since they answer different questions.
Which extension is best for finding broken links?
Check My Links scans a page and marks every link as valid, broken, or redirecting in seconds, which makes it the fastest option for a manual link audit or before outreach. SEO Minion covers the same job as part of a broader on-page check.
Do I still need a full SEO platform if I use Chrome extensions?
For most businesses, yes. Extensions read one page at a time; a platform like Ahrefs, Semrush, or Moz Pro crawls a whole site, stores historical data, and tracks competitors continuously. Extensions are the fast daily-check layer, not a replacement for the underlying research tool.
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.