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SEO Checker — Free On-Page SEO Audit Tool free Chrome extension icon
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SEO Checker — Free On-Page SEO Audit Chrome Extension

Instantly check any webpage's SEO. See meta tags, headings, links, images, Open Graph data, and an overall SEO score. Free Chrome extension, no signup.

4.9 (18 reviews)
Get the Free Extension

Works on Chrome, Brave & Opera · No signup required · Version 1.0.0 · Free forever

Features

Get an Instant SEO Score for Any Webpage

Instant SEO score out of 100 with animated score ring

Top issues list ranked by severity — high, medium, and low

Checks title tag, meta description, H1 heading, HTTPS, canonical URL

Image alt text audit — counts missing and empty alt attributes

Links analysis — internal links, external links, empty links, missing noopener

Open Graph tags check — title, description, image, URL

Structured data (Schema.org) detection and type listing

Viewport and mobile-friendliness check

Full report page with social preview, headings tree, content stats

100% free — no account, no signup, no usage limits

How It Works

Who Uses SEO Checker?

1

Install the Free Extension

Add SEO Checker to Chrome from the Chrome Web Store — no account or login required. Takes under 30 seconds.

2

Visit Any Webpage

Navigate to any webpage you want to audit. Works on your own site, competitor sites, or any public URL.

3

Click the Extension Icon

Click the SEO Checker icon in your Chrome toolbar. Your SEO score and top issues appear instantly.

4

View the Full Report

Click "View Full Report" to open a detailed SEO audit on NowViralFeed with social previews, heading structure, and more.

Use Cases

View a Full Detailed SEO Report

SEO Professionals

Quickly audit client pages during site walkthroughs without opening multiple tools. Get an instant score and top issues at a glance.

Bloggers & Content Creators

Check your own blog posts and landing pages before publishing. Catch missing meta tags, bad title lengths, and image alt text issues instantly.

Web Developers

Validate SEO during development and before launch. Catch technical issues like missing canonical tags, viewport problems, and structured data gaps.

Marketers

Analyze competitor pages to understand their SEO strategy — meta tags, heading structure, Open Graph setup, and structured data types used.

Small Business Owners

Check your own business website's SEO without needing a technical background. The score and issues list makes it easy to know what to fix.

Whether you're a student extracting lecture notes, a content creator repurposing video scripts, or a researcher archiving interview transcripts — the SEO Checker — Free On-Page SEO Audit Tool is designed to work instantly with no friction.Try the online transcript viewer →

Screenshots

See it in action

Screenshot 1 coming soon

Screenshot 2 coming soon

Screenshot 3 coming soon

FAQ

How to Check Your SEO in 4 Steps

Is SEO Checker free?+
Yes, completely free. No account, no payment, no hidden fees. Install from the Chrome Web Store and audit any webpage immediately.
Does SEO Checker send my page data to a server?+
No. SEO Checker runs entirely in your browser — it reads the DOM of the active tab locally. No page content is sent to any server. When you click "View Full Report," the data is encoded directly in the URL and opened on NowViralFeed.
What does the SEO score check?+
The score starts at 100 and deducts points for missing or incorrect: title tag, meta description, H1 heading, HTTPS, canonical URL, viewport meta tag, image alt text, Open Graph tags, structured data, and language attribute.
Does it work on any website?+
Yes — any public webpage. It will not work on browser system pages like chrome:// URLs or the new tab page, as Chrome extensions cannot inject scripts there.
Can I check competitor SEO with this tool?+
Absolutely. Navigate to any competitor's webpage and click the extension to see their SEO score, meta tags, heading structure, and issues instantly.
What browsers does SEO Checker support?+
SEO Checker works on Chrome, Brave, and Opera — any Chromium-based browser that supports Chrome extensions.

More questions? Visit our full FAQ or contact us.

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