MeasureSEO vs Plerdy SEO Analyzer (2026): which should you pick?

Pick MeasureSEO if

• Fits if you check a draft or live page for a keyword used too often
• Works for writers on pages in languages other than English, with stop-word lists for 25+

Look elsewhere if

• Too light for keyword research, as it gives no search volumes or rankings
• Watch out: pages built mostly with JavaScript, such as forums and web apps, are harder for it to read
• Skip it if you're not on Chrome, and note the extension's last update was in December 2023
• Watch out: the developer hasn't identified itself as a trader, so EU consumer rights don't apply

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

MeasureSEO

• Pages built mostly with JavaScript, such as forums and web apps, are harder to analyze, the listing says.
• It counts words on one page; it gives no search volumes or rankings.
• It is listed for Chrome only, and the listing was last updated on December 17, 2023.
• The developer has not identified itself as a trader, so EU consumer rights do not apply, as the store listing notes.

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.

MeasureSEO

Keyword counts and density

Lists every keyword on the page with how many times it appears and its percentage of the total word count, shown above the table.

Phrase length and minimum count

Switch the table between single words and longer phrases, and hide terms that appear fewer times than a set minimum.

Stop words in 25+ languages

Stop words are removed by default using lists in more than 25 languages, and you can add your own stop words or excluded words.

CSV export

Export the keyword table to CSV for reporting or further analysis.

Runs in the browser

The analysis happens in your browser without uploading page text, and the developer discloses that it collects no data.

Web tools

The MeasureSEO site has a keyword density checker for pasted drafts, plus robots.txt, meta tag, sitemap and UTM generators.

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.

MeasureSEO

• Free$0

  Keyword density on any page, CSV export and the web tools, with no sign-up.

Plerdy SEO Analyzer

• Free$0

  Every check in the extension, including the SEO score and AI tips.