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SEO Pro Extension vs Website SEO Checker (2026): which should you pick?

As of Oct 23, 2026, SEO Pro Extension and Website SEO Checker share a 3.0 GPA, both are free, so the choice depends on which features you need.

Checked Oct 23, 2026 · graded Oct 23, 2026 by ToolGPA

They get the same grade on all five counts.

Price, platforms and features side by side. The table says where each price was read and when.

SEO Pro Extension

Free Chrome and Firefox extension for on-page SEO checks

Free
Full detailschromewebstore.google.com

Website SEO Checker

Sitechecker's free Chrome extension for on-page SEO checks

Free
Full detailssitechecker.pro

Which one is for you

Pick SEO Pro Extension if

  • Fits if you size up a prospect's site in a few clicks during an audit
  • Works for checking whether a backlink on a page is followed

Look elsewhere if

  • Not for you if you want keyword, ranking or backlink data, as it has none
  • Watch out: Core Web Vitals are mobile field data only, and pages without enough Chrome data show site-wide figures or nothing
  • Too light for whole-site audits, since it checks one page at a time
  • Skip it if you browse in Safari or Edge, as only Chrome and Firefox are listed
  • Watch out: the store shows the last update as November 20, 2024, and the developer hasn't identified itself as a trader, so EU consumer rights don't apply

Pick Website SEO Checker if

  • Fits if you check a page's tags, indexing rules and hreflang without opening its source
  • Works for Sitechecker users who want a page's Search Console clicks and queries beside it

Look elsewhere if

  • Too light for whole-site audits, as it checks one page and site crawls are a separate Sitechecker product
  • Tight if you won't make a Sitechecker account, since Search Console figures and monitoring need one
  • Not for you if you browse in Firefox, Safari or Edge, as it's listed for Chrome only
  • Watch out: the developer hasn't identified itself as a trader, so EU consumer rights don't apply

How we grade them

3.0GPASEO Pro ExtensionVery good3.0GPAWebsite SEO CheckerVery good
Value for money
AFree, and the vendor's FAQ says it needs no subscription and will never ask for payment; donations are optional.
AFree from Sitechecker, with no paid tier for the extension and no sign-up for the on-page checks.
Free plan and trial
AFree outright: all seven tabs and every export, with nothing held back.
AFree outright: every on-page check works with no account. Search Console figures and change monitoring need a Sitechecker login, and the listing doesn't say whether a free account covers them.
Features
CTitle, description, canonical, robots, word count, mobile Core Web Vitals, status and redirects, a heading tree, links with nofollow marked, alt text, schema types and social preview, with CSV exports. The gap the listing names: no keyword, ranking or backlink data.
CStatus code, title, description, canonical, robots rules, headings, keyword density, links with follow status, image alt text, hreflang, schema and mobile and desktop speed. The gap the listing names: one page at a time, with site crawls a separate product.
Ease of use
BNo rating on record, but nothing to set up: the icon itself flags noindex pages and canonicals pointing elsewhere.
BNo rating on record, but nothing to set up for the page checks: install it and open the panel on any page, with no sign-up.
Platforms and integrations
CChrome and Firefox, so computers only, with Chrome UX Report data the one thing it pulls in.
CChrome only, so computers only. It reads Search Console and Google Analytics 4 data through a Sitechecker account, and nothing else is listed.
Best foron-page checks in seven tabson-page checks with your Search Console figures

The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: SEO Pro Extension and Website SEO Checker. How we grade

Price against what you get

SEO Pro Extension has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. Website SEO Checker has no paid plan and scores 2.3.

On this chart the two sit in the same place: the same score for the same starting price. Of the other SEO browser extensions on the chart, none scores higher than SEO Pro Extension for less, and none scores higher than Website SEO Checker for less.

Features, ease of use and platforms, averaged

C2.0B3.0A4.0Free$5$10$20$50More for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessSEO Pro ExtensionWebsite SEO Checker

What paid plans start at, a month (each step along is roughly double) →

  • The best score at each price
  • Has a free plan
  • No free plan
The full chart of SEO browser extensions, and the best at every price

Where they differ

    In commonFree planBrowser extensionSite auditSchema markupPage speed

    At a glance

    SEO Pro ExtensionWebsite SEO Checker
    PricingFreeFree
    Starts atFreeFree
    Free planThe vendor's FAQ says the extension is 100% free, needs no subscription and will never ask for payment; donations are optional.Free to install and use; Search Console insights and issue monitoring need a Sitechecker account with Search Console connected.
    Free trialNone listedNone listed
    Browser extension
    Made byMarketingSyrupCyber Circus Limited
    Price read frommarketingsyrup.comsitechecker.pro
    CheckedOct 23, 2026Oct 23, 2026

    Worth knowing

    SEO Pro Extension

    • It checks one page at a time and has no keyword, ranking or backlink data.
    • Core Web Vitals are mobile field data only; pages without enough Chrome data show site-wide figures or nothing.
    • It is available for Chrome and Firefox only; the Chrome Web Store shows its last update as November 20, 2024.
    • The Chrome Web Store notes the developer has not identified itself as a trader, so EU consumer rights do not apply.

    Website SEO Checker

    • It checks one page at a time; whole-site crawls are a separate product on the Sitechecker platform.
    • Search Console insights and issue monitoring work only when logged in to a Sitechecker account.
    • It is listed for Chrome only.
    • The Chrome Web Store notes the developer has not identified itself as a trader, so EU consumer rights do not apply.

    Key features

    SEO Pro Extension

    Overview tab
    Title, meta description, canonical, meta robots, language, word count and counts of headings, images and links, with links to robots.txt and the sitemap.
    Core Web Vitals
    Shows LCP, INP and CLS from Chrome's user experience data for mobile, falling back to whole-site figures when the page has none.
    Status codes and redirects
    The icon shows the page's HTTP status, and the Status tab shows redirect chains and how http/https and www versions are handled.
    Headings, links and images
    A color-coded heading tree, internal and external links with anchor text and nofollow highlighting, and image alt text, each exportable to CSV.
    Schema tab
    Lists the structured data types and entities on the page, including types such as Organization and Person that do not produce rich results.
    Social preview
    Shows the Open Graph image, title and description a page will use when shared on networks such as LinkedIn and X.

    Website SEO Checker

    On-page overview
    Shows URL structure, status code, page size, title, description and H1, canonical tag, and indexing rules from meta robots, X-Robots-Tag and robots.txt.
    Content analysis
    Lists and highlights the H1 to H6 headings, counts words and characters, and gives keyword density for one, two and three-word phrases and the text-to-code ratio.
    Links and images
    Sorts links into internal, external and subdomain with dofollow or nofollow status, anchor text and HTTP codes, and flags images missing alt text or broken.
    Hreflang and structured data
    Checks hreflang codes and return links for international sites and lists the Schema.org types and properties found on the page.
    Page speed
    Measures loading speed on mobile and desktop and points to the elements slowing the page down.
    Search Console insights and monitoring
    With a connected account, shows clicks, impressions, CTR, position and top queries over 7 to 90 days, indexing status, and changes to the page over time.

    Plans

    SEO Pro Extension

    • Free$0

      All seven tabs and every export, free for Chrome and Firefox, with an optional donation link.

    Website SEO Checker

    • Free$0

      Every on-page check with no sign-up; Search Console data and monitoring appear once you log in to Sitechecker.

    Common questions

    Which is cheaper, SEO Pro Extension or Website SEO Checker?

    As of Oct 23, 2026, both SEO Pro Extension and Website SEO Checker are free to use.

    Which has a free plan, SEO Pro Extension or Website SEO Checker?

    As of Oct 23, 2026, both SEO Pro Extension and Website SEO Checker have a free plan.

    More comparisons

    How this page was made

    • The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
    • The grades are our own, from each tool’s review or report card. The GPA is their average.
    • Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
    • The differences and the answers to the questions are worked out from those listings.
    How we review and grade