SEO Pro Extension vs SEO Spider Tools (2026): which should you pick?
As of Oct 23, 2026, SEO Pro Extension and SEO Spider Tools 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
SEO Spider Tools
SpiderNow's free extension for technical and on-page SEO checks
Free
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 SEO Spider Tools if
- Fits if you check a page's redirects, directives and broken links while browsing
- Works for site owners who want an .htaccess file for redirects and caching without writing it
Look elsewhere if
- Too light for whole-site audits, which SpiderNow sells on its website from $6.99 a month
- Watch out: the listing doesn't say whether it needs a SpiderNow account or counts against that account's scans
- Skip it if you're on Firefox or Safari, as only Chrome and Edge versions are listed
- Watch out: the Chrome version was last updated in October 2023, and the developer isn't a declared trader, so EU consumer rights don't apply
How we grade them
| 3.0GPASEO Pro ExtensionVery good | 3.0GPASEO Spider ToolsVery 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 the Chrome Web Store, which lists no in-app purchases. SpiderNow's site scans are sold separately, from $6.99 a month. |
| Free plan and trial | AFree outright: all seven tabs and every export, with nothing held back. | AFree outright as far as the store shows: every check, the content editor and the .htaccess builder. The listing can't say whether it needs a SpiderNow account. |
| 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. | CRobots and meta directives, links with follow status, broken links and redirect chains, status codes, Core Web Vitals, titles, headings, canonical, hreflang, schema errors and thin pages. The gap the listing names: one page at a time, with full-site scans sold separately. |
| 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, and nothing to set up is on record: install it and open the panel on a page. |
| Platforms and integrations | CChrome and Firefox, so computers only, with Chrome UX Report data the one thing it pulls in. | CChrome and Edge, so computers only. It pulls Core Web Vitals from PageSpeed Insights, and nothing else is listed. |
| Best for | on-page checks in seven tabs | technical checks on one page, plus .htaccess files |
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 SEO Spider Tools. 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. SEO Spider Tools 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 SEO Spider Tools for less.
Features, ease of use and platforms, averaged
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
Where they differ
- SEO Spider Tools also covers internal linking.
In commonFree planBrowser extensionSite auditSchema markupPage speed
At a glance
| SEO Pro Extension | SEO Spider Tools | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | The vendor's FAQ says the extension is 100% free, needs no subscription and will never ask for payment; donations are optional. | The extension is free to install; the store listing lists no in-app purchases. SpiderNow's own account plans are sold separately. |
| Free trial | None listed | None listed |
| Browser extension | ||
| Made by | MarketingSyrup | SpiderNow (OrganicRankings.com, LLC) |
| Price read from | marketingsyrup.com | chromewebstore.google.com |
| Checked | Oct 23, 2026 | Oct 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.
SEO Spider Tools
- Full-site scans and reports are sold on SpiderNow's website: a free account covers a few single-page scans a month, and paid plans start at $6.99 a month.
- The listing does not say whether the extension needs a SpiderNow account or counts against its scan limits.
- Chrome and Edge versions are listed; the Chrome listing was last updated on October 11, 2023.
- The developer has not identified itself as a trader, so EU consumer rights do not apply, as the store listing notes.
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.
SEO Spider Tools
- Indexing directives
- Finds URLs blocked by robots.txt and pages set to noindex, nofollow, noarchive or nosnippet, and shows resources blocked from rendering.
- Links and redirects
- Lists inlinks and outlinks with anchor text and follow status, and finds broken links, redirect chains and loops, JavaScript redirects and meta refreshes.
- Status and speed
- Shows status codes, SSL, server type, response time, file sizes and load time, plus Core Web Vitals scores for mobile and desktop from PageSpeed Insights.
- Tags and structured data
- Checks titles, descriptions and H1 to H6 headings for length and duplicates, canonical and hreflang tags, schema errors and pages under 250 words.
- Content editor
- Edit page text with alerts on title, description and heading limits, and counts of characters, words, sentences, repeated words and keyword density.
- .htaccess generator
- Builds an .htaccess file with 301 redirects, a www rewrite, caching rules for scripts and images, hotlink protection and custom error pages.
Plans
SEO Pro Extension
Free$0
All seven tabs and every export, free for Chrome and Firefox, with an optional donation link.
SEO Spider Tools
Free$0
The extension's on-page and technical checks, free from the Chrome Web Store.
Common questions
Which is cheaper, SEO Pro Extension or SEO Spider Tools?
As of Oct 23, 2026, both SEO Pro Extension and SEO Spider Tools are free to use.
Which has a free plan, SEO Pro Extension or SEO Spider Tools?
As of Oct 23, 2026, both SEO Pro Extension and SEO Spider Tools have a free plan.
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- SEO Spider Tools vs Website SEO Checker
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.