How to choose an SEO Chrome extension
Decide which job you need done
Keyword extensions answer "how many people search this, and what does a click cost". Authority extensions answer "how strong are the sites I am up against". Audit extensions answer "what is wrong with this page". Few do all three, which is why most people end up with two or three installed.
Check what is actually free
Many extensions are free to install and then ask for an account, credits or a subscription for the numbers you wanted. The price column above and the facts in each review say where that line falls.
Check when it was last updated
Google changes its results page often, and Chrome changes its rules for extensions. An extension that has not been updated in two years may still work, but it is a risk. Each review gives the date from the Chrome Web Store.
Count the panels
Every extension that runs on Google adds something to the page. Three of them together make results slow and hard to read. An extension that covers more than one job keeps the page clean.
The 13 best SEO Chrome extensions
1. KWScanner
Top pick: keyword data, authority and a page audit in one
- PriceAudit and badges free; keyword data from $5
- Account neededOnly for keyword data
- BrowsersChrome and Firefox
Most SEO extensions do one of three jobs: show keyword numbers on Google, show how strong the ranking sites are, or audit the page you are on. KWScanner does all three, and two of them are free.
Search on Google and the search volume, cost per click, competition and a trend of up to four years appear on the results page, with a Domain Rating and domain age badge beside every result. Open the extension on any page and it runs a full on-page SEO audit with a PDF report. The audit and the badges use no credits and need no account. Keyword lookups cost one credit each, and every new account starts with 10,000 free credits. The full feature list is below.
Strengths
- Keyword numbers, authority and on-page audit in one extension
- Audit and Domain Rating badges are free, with no account
- Trend of up to four years, not only twelve months
- Volume, CPC and competition match Google Ads
- Chrome and Firefox
Weaknesses
- Keyword data works on Google only, not YouTube or Amazon
- Worldwide plus seven countries
- Keyword lookups use credits once the free 10,000 are spent
Get the KWScanner extension
2. Keywords Everywhere
Best for keyword data beyond Google
- PriceAnnual plans from $84/year (100,000 credits)
- Account neededFor paid data
- BrowsersChrome, Firefox and Edge
- Chrome Web Store1,000,000 users, updated September 2026
Keywords Everywhere is the best-known keyword extension. With paid credits it shows volume, CPC, competition and trend charts on Google and more than fifteen other sites, including YouTube and Amazon.
Without credits it still shows keyword widgets, an on-page analysis, link metrics and traffic estimates, but not the volume or CPC most people install it for. Credits are sold as annual plans and are valid for a year. See the Keywords Everywhere alternative page.
Strengths
- Works on Google, YouTube, Amazon and many more sites
- Low yearly cost
- Useful free widgets
Weaknesses
- Volume and CPC need paid credits
- Annual prepayment; credits expire after a year
- Related keywords in widgets also use credits
Sources: the Keywords Everywhere website and its Chrome Web Store listing, October 2026.
3. Keyword Surfer
Best free volume on Google
- PriceFree
- Account neededNo
- BrowsersChrome
- Chrome Web Store600,000 users, updated January 2026
Keyword Surfer, from Surfer, shows search volume and CPC on Google results at no cost, with keyword ideas in a side panel, for 70 countries. You can save keywords into collections and export them.
It is the simplest way to see a volume for free. Surfer does not say where the figures come from, there is no competition figure or trend, and it does no on-page or link checking. Compare the two on the Keyword Surfer alternative page.
Strengths
- Free, with no account
- Volume and CPC on Google for 70 countries
- Exportable keyword collections
Weaknesses
- Data source is undisclosed
- No competition, trend or authority data
- Chrome only; last updated in January 2026
Sources: the Keyword Surfer website and its Chrome Web Store listing, October 2026.
4. Ubersuggest
Best free volume on YouTube and Amazon
- PriceFree with daily limits; paid plans optional
- Account neededNo
- BrowsersChrome
- Chrome Web Store600,000 users, updated September 2026
The Ubersuggest extension shows volume, CPC and competition on Google, YouTube and Amazon, along with a domain score, referring domains and traffic estimates for the sites that rank.
Its listing says every feature is free with daily limits and no account. The limits are not published, so heavy use will run into them. The Ubersuggest alternative page covers the full product.
Strengths
- Free without an account
- Covers YouTube and Amazon as well as Google
- Domain metrics for ranking sites
Weaknesses
- Daily limits are not stated
- No on-page audit listed
- Pushes toward a paid plan
Sources: the Ubersuggest website and its Chrome Web Store listing, October 2026.
5. Detailed SEO Extension
Best free on-page inspector
- PriceFree
- Account neededNo
- BrowsersChrome and Firefox
- Chrome Web Store600,000 users, updated June 2026
Detailed shows what an SEO checks first on any page: title, meta description, robots directives, headings, links, images, schema and hreflang, each a click away. It also pulls the People Also Ask questions from a results page.
It is free with no account and no upsell, and it is quick. It does not show keyword volume or authority metrics, so most people pair it with a keyword extension.
Strengths
- Free, no account, no upsells
- Fast and well organised
- CSV exports
Weaknesses
- No keyword volume or CPC
- No authority metric
- No broken link check listed
Sources: the Detailed SEO Extension website and its Chrome Web Store listing, October 2026.
6. SEOquake
Best free metrics on the results page
- PriceFree; a Semrush account adds more
- Account neededOptional
- BrowsersChrome
- Chrome Web Store1,000,000 users, updated October 2026
SEOquake, from Semrush, lays a bar of metrics under every Google result, such as domain rank, estimated organic traffic and backlinks, and adds an on-page audit, a keyword density report and a broken link check.
The core is free without an account. Connecting a Semrush account adds Authority Score and deeper data. It does not show search volume or CPC for the query.
Strengths
- A lot of data free, with no account
- On-page audit, density and broken links
- PDF and CSV exports
Weaknesses
- No search volume or CPC
- Authority Score needs a Semrush sign-in
- The results page gets crowded
Source: its Chrome Web Store listing, October 2026.
7. Ahrefs SEO Toolbar
Best free technical checks
- PriceFree; SERP and keyword data from $29/month
- Account neededFor DR and UR
- BrowsersChrome, Firefox and Safari
- Chrome Web Store400,000 users, updated September 2026
The free part of the Ahrefs toolbar is a capable technical inspector: on-page report, hreflang and canonical checks, a redirect tracer, HTTP headers, a link highlighter and a broken link check.
Domain Rating and URL Rating need a free sign-in. Keyword volume, difficulty and the metrics on Google results need a paid Ahrefs plan, which starts at $29 a month. See the Ahrefs alternative page.
Strengths
- Strong free technical checks
- Redirect tracer and header viewer
- Chrome, Firefox and Safari
Weaknesses
- Keyword and results-page data are paid
- DR and UR need an account
- Best value only if you already pay for Ahrefs
Sources: the Ahrefs SEO Toolbar website and its Chrome Web Store listing, October 2026.
8. MozBar
Best for Domain Authority
- PriceFree with a Moz account; more with Moz Pro
- Account neededFor DA and PA
- BrowsersChrome
- Chrome Web Store900,000 users, updated September 2026
MozBar puts Domain Authority and Page Authority on any page and beside every Google result, which is still the metric many clients ask about. It also checks schema, hreflang, robots and image alt text.
Without an account it shows on-page elements and link details only. DA and PA need a free Moz account, and page optimisation and keyword queries need Moz Pro.
Strengths
- DA and PA on pages and results
- Link colouring by type
- CSV export of results
Weaknesses
- Metrics need an account
- No search volume without Moz Pro
- Lowest store rating of the group
Source: its Chrome Web Store listing, October 2026.
9. Mangools SEO Extension
Best for Moz and Majestic metrics together
- PriceFree checks; metrics need a Mangools account
- Account neededFor metrics
- BrowsersChrome and Firefox
- Chrome Web Store50,000 users, updated August 2026
The Mangools extension shows Moz's DA and PA beside Majestic's Citation Flow and Trust Flow, with backlinks and the keywords a page ranks for. On-page and page-speed checks are free without an account.
The authority metrics, keywords and backlinks need a Mangools account, which starts with a 10-day free trial. More on the Mangools alternative page.
Strengths
- Two authority providers in one panel
- On-page and speed checks are free
- Chrome and Firefox
Weaknesses
- Best data sits behind a trial or paid plan
- Smallest user base here
- Trial ends after 10 days
Sources: the Mangools SEO Extension website and its Chrome Web Store listing, October 2026.
10. SEO Minion
Best technical toolkit for Keywords Everywhere customers
- PriceNeeds a Keywords Everywhere Silver plan ($168/year) or higher
- Account neededYes
- BrowsersChrome, Firefox and Edge
- Chrome Web Store200,000 users, updated February 2026
SEO Minion bundles on-page analysis, link highlighting, a broken link check, redirect tracing, hreflang validation, a results preview, a search location simulator and a comparison of the page's HTML with its rendered version.
It was free for years. Its listing now says it is available only to customers of Keywords Everywhere's Silver plan or higher, so it is best seen as part of that subscription.
Strengths
- Wide range of technical checks
- Location simulator for local results
- Chrome, Firefox and Edge
Weaknesses
- No longer free
- Tied to a Keywords Everywhere annual plan
- No keyword volume of its own
Sources: the SEO Minion website and its Chrome Web Store listing, October 2026.
11. Redirect Path
Best for redirects
- PriceFree
- Account neededNo
- BrowsersChrome
- Chrome Web Store300,000 users, updated May 2026
Redirect Path, from Ayima, does one thing well. It shows every step a URL took to reach the page in front of you: 301 and 302 redirects, 404 and 500 errors, and the meta and JavaScript redirects that other tools miss.
It also shows response headers and the server address. It is a specialist, so it sits beside a broader extension, not in place of one.
Strengths
- Shows each hop of a redirect chain
- Catches meta and JavaScript redirects
- Free, works locally
Weaknesses
- Single purpose
- No on-page or keyword data
- Checks one URL at a time
Sources: the Redirect Path website and its Chrome Web Store listing, October 2026.
12. SEO META in 1 CLICK
Best for a quick look at meta tags
- PriceFree
- Account neededNo
- BrowsersChrome
- Chrome Web Store1,000,000 users, updated August 2024
One click shows the title and description with their lengths, canonical, robots, the heading order, image alt counts, link counts and the Open Graph and Twitter tags, with links to robots.txt and the sitemap.
It is simple and very highly rated. It has not been updated since August 2024, which is worth knowing before you rely on it.
Strengths
- Very simple
- Free, no account
- Highly rated by a large user base
Weaknesses
- Not updated since August 2024
- No broken link or schema validation listed
- No keyword or authority data
Sources: the SEO META in 1 CLICK website and its Chrome Web Store listing, October 2026.
13. SEO Pro Extension
Best free Core Web Vitals and redirect chains
- PriceFree
- Account neededNo
- BrowsersChrome and Firefox
- Chrome Web Store100,000 users, updated November 2024
SEO Pro Extension covers the on-page basics and adds two things few free extensions have: Core Web Vitals from Google's field data, and the full redirect chain with status codes.
It is free with no account, and exports to CSV. Its last update was in November 2024.
Strengths
- Core Web Vitals field data
- Redirect chains and status codes
- Free, no account
Weaknesses
- Not updated since November 2024
- No keyword or authority data
- No broken link check listed
Sources: the SEO Pro Extension website and its Chrome Web Store listing, October 2026.
KWScanner extension features: the full list
This is the complete list, grouped by where you meet each feature, with what it costs. One credit is one keyword lookup; credits start at $5 for 10,000, never expire, and every new account gets 10,000 free.
Keyword data under the Google search bar
1 credit per search
- Monthly search volume, averaged over the last 12 months
- Cost per click in US dollars
- Competition, as Google Ads reports it, from 0 to 1
- A 12-month sparkline of demand
- One click to save the keyword to your Favorites list
- Matches Google's light or dark theme and updates as you search
- Repeating a search in the same session does not use another credit
Trend chart
Included with every search
- Monthly searches going back up to four years
- Switch between 12 months and 4 years
- Hover any bar for the month and its exact volume
Related keywords
10 credits per lookup, optional
- Up to 40 related keywords, built from Google's own suggestions and related searches
- Volume and CPC for each one
- Save one keyword, or all of them, to Favorites
- Copy keywords and volumes for Google Sheets or Excel
- Open any keyword as a new Google search
- Off by default, so it never spends credits unless you turn it on
Authority on every Google result
Free, no account
- Ahrefs Domain Rating for each ranking site, from 0 to 100
- Domain age, from the registration date
- Shown as two small badges beside each organic result
- Uses no credits and works signed out
On-page SEO audit of any page
Free, no account
- Indexability: meta robots, X-Robots-Tag, robots.txt rules for Googlebot and whether the URL is in the sitemap
- Title and meta description with length checks, canonical, H1, viewport and language
- A preview of how the page may appear in Google results
- Core Web Vitals for the page load: LCP, CLS and INP (in Chrome)
- Full heading outline with skipped levels flagged
- Every link with its status code, so broken links stand out, filterable by internal, external and nofollow
- Every image with alt text, size and status, with missing alt text flagged
- Keyword density for one, two and three-word phrases
- Structured data: required and recommended properties checked for 24 schema types
- Open Graph and Twitter card tags with a share preview, and a size check on the share image
- hreflang tags, with a check that each alternate links back
- Response headers and page weight by resource type
Reports and exports
Free
- A branded PDF report of the whole audit
- CSV exports for links, images, keyword density and headers
- Copy any structured data block
Right-click lookup on any website
1 credit
- Select any text, right-click and choose Get keyword data
- Volume, CPC and competition in a small card beside the text
- A 12-month chart of demand
Settings
Free
- Worldwide data, or the United States, United Kingdom, Canada, Australia, India, New Zealand or South Africa
- Google Search alone, or Google Search plus search partners
- Switch keyword data, related keywords and authority badges on or off separately
- Your credit balance in the extension, shared with the dashboard and AI assistants
What it does not do: it has no keyword difficulty score, it does not show each hop of a redirect chain, and its keyword data covers Google search only. For bulk work, the same account includes a dashboard that looks up 3,000 keywords at a time.
Get the KWScanner extension
The best Chrome extensions for keyword research
Four extensions on this list put search volume and CPC on the Google results page.
- KWScanner shows volume, CPC, competition and a trend of up to four years, from Google's advertising data. 10,000 lookups are free, then $5 buys 10,000 more with no expiry.
- Keywords Everywhere covers the most sites. Its volume and CPC need credits bought as an annual plan.
- Keyword Surfer is free, with volume, CPC and ideas, from a source it does not disclose.
- Ubersuggest is free with daily limits and also works on YouTube and Amazon.
For research beyond the browser, see the guide to the best keyword research tools.
The best free SEO Chrome extensions
How these SEO extensions were compared
Each entry is based on the extension's Chrome Web Store listing, and its maker's own site where available, read in October 2026: what it shows, what is free, whether it needs an account, which browsers it supports and when it was last updated. Extensions whose store listing would not load were left out. User counts are the rounded figures the store displays.
Try the KWScanner extension
Install it for Chrome or Firefox and run the on-page audit on any page, free. Create an account for 10,000 free keyword lookups, no card needed.
Get the extension
