For SEO writers and content editors

Analyze any web page for keyword density in one click.

Run a full content audit on the rendered article: density, readability, 1/2/3-word phrase frequency, and word count. No copy-paste, no upload, no third-party SEO suite needed.

Free Privacy-first No signup needed
https://example.com/blog/seo-content-checklist
Keyword Density Checker Pro Live page
Words
1,247
Reading
5.2m
Score
78
1-word
2-word
3-word
keyword density182.4%
seo checklist111.5%
content audit81.1%
readability60.8%

What it does

Built for the moment after the draft. Open the page in Chrome, click the icon, get a full content profile without pasting text into another tool.

Analyze the rendered body

Strips navigation, footer, sidebar, and boilerplate so the report reflects the article a reader actually sees, not the markup soup around it.

1/2/3-word phrase frequency

Switch between single, two, and three-word phrase views. Find overused terms, missing secondary keywords, and natural long-tail patterns.

Readability score

Flesch reading-ease score plus average sentence and word length, computed on the visible content. Calibrate copy for the audience.

Top keywords table

Sorted list of the highest-density terms with raw count, percentage, and a quick-export button for the report. No spreadsheet wrangling.

Side-by-side comparison

Compare the current page against a competitor URL or your own previous draft. Spot the keyword gap and the over-stuffed phrases instantly.

Runs locally

Page text, keyword counts, and the readability score are all computed in the extension. Nothing is uploaded to a remote SEO API.

How it works

Open the page, click once, work through the report in under a minute.

1

Open the page and click the icon

Your draft, a competitor article, or any rendered page. The extension reads the visible article body and runs the analysis without leaving the tab.

/blog/seo-content-checklist
Words
1,247
Sentences
68
Paragraphs
14
2

Switch the phrase length

Toggle between one, two, and three-word views. Two-word view exposes natural long-tail phrases the spreadsheet view of single keywords cannot.

1-word
2-word
3-word
seo checklist111.5%
content audit81.1%
keyword density70.9%
3

Read the readability score

A single Flesch score plus a band (very easy, plain, moderate, difficult). Hover for the average sentence and word length feeding the score.

78
Plain EnglishSentence avg: 14 words
Word avg: 4.6 letters
Targets 8th grade reading.
4

Compare across pages

Paste a competitor URL or load a saved draft. Density tables sit side by side so the keyword gap is obvious without exporting to a sheet.

Current
seo checklist1.5%
content audit1.1%
readability0.8%
Competitor
seo checklist2.2%
content audit0.4%
readability1.6%

Runs locally in Chrome

Your page content is not uploaded to any server. Word counts, density tables, and readability scores are computed inside the extension. No remote SEO API, no tracking pixel on the analyzed text.

Get the SEO content toolkit by email

Density benchmarks per niche, before-and-after audit examples, prompts that fix keyword stuffing, and updates from the Peak Productivity team. No spam.

Pricing

Free today, with optional Pro features in development for agency teams.

Free
$0

Forever. No card. No signup.

  • Live-page keyword density analysis
  • 1, 2, and 3-word phrase views
  • Readability score and word stats
  • Top keywords table with quick export
  • Side-by-side comparison with one URL
  • Local processing, no upload
Add to Chrome
Pro tier is in development: bulk URL audits, saved keyword sets, agency report PDFs, and historical drift tracking. Email signup above gets early access.

Frequently asked questions

The questions writers and SEO editors ask before installing.

Is it free?
Yes. Density analysis, readability, comparison view, and exports are free with no signup and no card. A Pro tier with bulk audits and agency reports is planned, but the current free release stays free forever.
Does it work offline?
Yes. Analysis runs locally on the page already in your tab, so a network connection is not required after install. Comparison against a remote competitor URL needs network because the extension has to fetch that page.
Is my data sent anywhere?
No. Page text, keyword counts, readability scores, and saved comparisons all stay on your machine. No remote SEO API, no tracking pixel on the analyzed content, and no account.
How do I install?
Click Add to Chrome, accept the standard activeTab permission (so the extension can read the open page when you click), pin the icon, and you are ready to audit.
Does it work on Edge, Brave, or Opera?
Yes. Any Chromium browser that supports Chrome Web Store extensions can install it. Edge, Brave, Opera, and Vivaldi are tested. Firefox uses a different extension format and is not currently supported.
How does it pick the article body?
It uses a readability heuristic (similar to the one Reader Mode browsers use): largest contiguous block of paragraph text, with navigation, footer, sidebar, and code blocks excluded. You can also pick a custom selector if the default misreads a layout.
How do I uninstall?
Right-click the extension icon and pick Remove from Chrome. There is no remote account to close because there is no account in the first place.

More from Peak Productivity

Privacy-first Chrome utilities from the same team. Free, no signup, run locally.

Ready to audit content without copy-paste?

Install once, audit any page in one click. Free, runs locally.

Add to Chrome, it's free