Detailed SEO Extension vs Plerdy SEO Analyzer (2026): which should you pick?
As of Oct 23, 2026, Detailed SEO Extension and Plerdy SEO Analyzer 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.
Detailed SEO Extension
Free Chrome and Firefox extension for one-click on-page SEO checks
Free
Which one is for you
Pick Detailed SEO Extension if
- Fits if you check titles, headings and schema on single pages and don't want to read the source
- Works for checking hreflang on a multi-language site, alternate by alternate
Look elsewhere if
- Skip it if you want search volumes, rankings or backlinks, as it has none of its own
- Too light for whole-site audits, since it inspects one page at a time
- Not for you if you browse in Safari or Edge, as only Chrome and Firefox are listed
- Watch out: the changelog's last entry is December 2024, though both stores show an update in 2026, and the interface is English only
Pick Plerdy SEO Analyzer if
- Fits if you want a page's tags, readability and keyword use checked before you publish it
- Works for developers looking for slow scripts, styles and images on a single page
Look elsewhere if
- Too light for whole-site audits, as daily site checks and Search Console alerts are Plerdy's separate SEO Checker
- Skip it if you want search volumes, rankings or backlinks, as none are on record
- 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
| 3.0GPADetailed SEO ExtensionVery good | 3.0GPAPlerdy SEO AnalyzerVery good | |
|---|---|---|
| Value for money | AFree outright on Chrome and Firefox, and its page says there's no paid version and no upsells. Tags, headings, links, schema and hreflang all come at no cost. | AFree from Plerdy, with every check in the extension, the 0 to 100 score and the AI tips included. Plerdy's paid analytics plans are a separate product. |
| Free plan and trial | AEvery feature is free, with no account, no plan to upgrade to and nothing held back. | AFree outright: the audit, score, AI suggestions, text analysis, link and image checks and timings, with nothing held back. |
| Features | CTitle, meta description, meta robots and X-Robots-Tag, headings, link and image exports, schema, hreflang with return-link checks and People Also Ask extraction. The gap the listing names: no keyword volumes, rankings or backlink data of its own. | CTitle, description, H1, robots, canonical and hreflang, a 0 to 100 score with AI tips, readability and keyword share, links, alt text, Open Graph, schema, load timings and technology detection. The gap the listing names: one page at a time, with site audits a separate product. |
| Ease of use | BNo rating on record, but there's nothing to set up: install it, open a page, click the icon and the panel is there. | BNo rating on record, but nothing to set up: install it, open a page and click the icon for the audit. |
| Platforms and integrations | CChrome and Firefox extensions, so computers only, with no Safari or Edge version named. The Ahrefs, Semrush, Moz and Majestic links open those sites; no data is pulled in from them. | CChrome only, so computers only, with no integrations listed. |
| Best for | one-click page checks in Chrome or Firefox | a scored on-page audit of one page |
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: Detailed SEO Extension and Plerdy SEO Analyzer. How we grade
Price against what you get
Detailed SEO Extension has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. Plerdy SEO Analyzer 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 Detailed SEO Extension for less, and none scores higher than Plerdy SEO Analyzer 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
- Plerdy SEO Analyzer also covers content optimization and page speed.
In commonFree planBrowser extensionSite auditSchema markup
At a glance
| Detailed SEO Extension | Plerdy SEO Analyzer | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | The whole extension is free on Chrome and Firefox; its page says there are no upsells and no paid version. | The extension is free; Plerdy's paid analytics plans are a separate product. |
| Free trial | None listed | None listed |
| Browser extension | ||
| Made by | Detailed | Plerdy |
| Price read from | detailed.com | plerdy.com |
| Checked | Oct 23, 2026 | Oct 23, 2026 |
Worth knowing
Detailed SEO Extension
- It inspects one page at a time and has no keyword volumes, rankings or backlink data of its own.
- It is listed for Chrome and Firefox only; the vendor names no Safari or Edge version.
- The changelog's latest entry is December 2024, though both stores show version 2.2.7 updated in 2026.
- The interface is in English only, according to the Chrome Web Store listing.
Plerdy SEO Analyzer
- It audits the page in front of you; daily site audits and Search Console alerts are part of Plerdy's separate SEO Checker.
- 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
Detailed SEO Extension
- Page overview
- Shows the title tag, meta description, meta robots and X-Robots-Tag header for the page you are on, with a quick link to its sitemap.xml.
- Headings view
- Lists every heading tag indented by level, with a button that copies them all to the clipboard.
- Links and images export
- Exports all links on a page and shows whether each is nofollow or sponsored; image URLs can be downloaded as a CSV file.
- Schema and hreflang
- Shows a page's structured data markup and all its hreflang alternates, with status codes and a check that each alternate links back.
- People Also Ask extraction
- An option on the Advanced tab extracts People Also Ask questions from Google results, including several levels deep.
- Right-click shortcuts
- Open the current page or site in Ahrefs, Moz, Majestic, Semrush, Similarweb or Archive.org, or run a site: search, from the context menu.
Plerdy SEO Analyzer
- On-page audit and SEO score
- Checks title, description, H1, robots, canonical and hreflang tags, then rates the page from 0 to 100 and lists what to fix.
- AI suggestions
- Gives AI-generated tips with examples for meta tags, headings, keyword placement, readability and internal links, plus E-E-A-T and AEO checks.
- Text and keyword analysis
- Counts words and characters, keyword and stop-word share, uniqueness, sentence length and Flesch reading ease; click a keyword to highlight it on the page.
- Links, images and headings
- Reports dofollow, nofollow and duplicate links with their anchors, flags images with no alt text, and maps the H1 to H6 structure.
- Open Graph and schema markup
- Shows Open Graph and X (Twitter) card tags and the structured data a page carries, to check social previews and rich results.
- Performance and technologies
- Lists load time, DNS, TCP, TTFB and DOM timings, flags JS, CSS and image files slower than 300 ms, and detects analytics tools, pixels, CMS and frameworks.
Plans
Detailed SEO Extension
Free$0
Every feature of the extension, free to install from the Chrome Web Store or Firefox Add-ons.
Plerdy SEO Analyzer
Free$0
Every check in the extension, including the SEO score and AI tips.
Common questions
Which is cheaper, Detailed SEO Extension or Plerdy SEO Analyzer?
As of Oct 23, 2026, both Detailed SEO Extension and Plerdy SEO Analyzer are free to use.
Which has a free plan, Detailed SEO Extension or Plerdy SEO Analyzer?
As of Oct 23, 2026, both Detailed SEO Extension and Plerdy SEO Analyzer have a free plan.
More comparisons
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- Plerdy SEO Analyzer vs SEOquake
- Plerdy SEO Analyzer vs SEO META in 1 CLICK
- Plerdy SEO Analyzer vs SEO Pro Extension
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.