Free SEO Chrome Extension: Audit Any Website in 10 Seconds

i built a chrome extension that scans any website for 10 SEO factors and returns a score instantly. here's what it checks and why i'm giving it away for free.

what it scans

the extension checks:

meta title — exists, length between 30-60 chars
meta description — exists, length between 120-160 chars
heading structure — h1 exists, proper hierarchy
image alt text — all images have descriptive alt attributes
internal links — at least 3 internal links on the page
SSL certificate — site uses HTTPS
mobile viewport — meta viewport tag present
page load indicators — basic performance signals
schema markup — structured data present
canonical URL — canonical tag properly set

how it works

click the extension icon on any page. it injects a content script that reads the DOM, checks each factor, and displays results in a popup. no data leaves your browser.

// simplified check example
function checkMetaTitle() {
  const title = document.querySelector('title');
  if (!title) return { pass: false, msg: 'Missing title tag' };
  const len = title.textContent.length;
  if (len < 30) return { pass: false, msg: 'Title too short (' + len + ' chars)' };
  if (len > 60) return { pass: false, msg: 'Title too long (' + len + ' chars)' };
  return { pass: true, msg: 'Title OK (' + len + ' chars)' };
}

why free

i scraped 798 marketing agency websites and scanned each one. the scan data feeds into personalized cold email pitches — "your site is missing alt text on 23 images" is more compelling than "your SEO could be better."

the extension is the tool. the data it produces is the product.

what the pro version adds

for $9, the pro tier shows:

detailed recommendations for each failing check
competitor comparison (scan two sites side by side)
export results as PDF report
historical tracking (scan the same site over time)

get it

free version: install from gumroad — full scanning, basic results
pro version ($9): detailed recommendations + export + comparison
free agency contacts: 50-contact sample from the 798 agencies i scanned

if you're doing any kind of web development or SEO work, having a quick audit tool saves hours of manual checking. the free version does 90% of what you need.

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