SEO Fundamentals
The On-Page SEO Checklist Every Page Needs Before Publishing
A step-by-step audit routine — from title tags to image alt text — that takes less than 5 minutes per page.
Read Article →
Chrome Extension • Free • No API Key Required
Free On-Page SEO
Extension for Chrome
SEO Captain gives you a full picture of any webpage's SEO health in one click — from meta tags and audit scores to SERP previews and content readability.
8+
Analysis Modules
0
API Keys Needed
<1s
Analysis Speed
100%
Free to Use
See It In Action
Everything You Need,
Right in Your Browser
Click the extension on any page and instantly get a deep-dive report — no setup, no integrations, no waiting.
SEO Captain
yourwebsite.com/page
Summary
Generate
Audit
Preview
Content
Tools
90
/100
Excellent
Well optimized for search engines
HTTPS
Site is served over HTTPS
Title Tag
Found & valid
Title Length
69 chars — too long (ideal: 50–60)
Meta Description
Found & valid
H1 Tag
Present on page
Instant Audit Score
Get a score out of 100 with pass/warn/fail checks for every critical SEO factor on the page.
Complete Meta Summary
See all meta tags — title, description, canonical, robots, Open Graph — in one organized panel.
Auto-Generate Titles & Descriptions
Instantly generate SEO-optimized titles and meta descriptions. No API key. No AI credits.
SERP & Social Preview
Preview exactly how your page will appear on Google, Facebook, and Twitter before you publish.
Full Feature Set
Eight On-Page SEO Analysis Modules in One Chrome Extension
Every tab in SEO Captain is a standalone analysis tool — together they give you a complete picture of any page's SEO health.
01
SEO Summary
Full meta tag overview at a glance. See title, description, keywords, canonical URL, robots directives, Open Graph tags, publisher info, and language — all in one panel.
02
Title & Description Generator
Generate multiple SEO-optimized title and description variants in milliseconds. Powered by on-device JavaScript — no API key, no external calls, no cost.
03
SEO Audit
Automated checks across HTTPS, title tags, meta descriptions, H1 presence, canonical setup, and more. Get a score out of 100 with actionable fix guidance for every issue.
04
SERP & Social Preview
Visualize how your page looks in Google search results on desktop and mobile. Plus preview what gets shown when the URL is shared on Facebook and Twitter.
05
Content Analysis
Readability grade, word count, sentence count, and average words per sentence. Check keyword density to understand how prominently your target terms appear on the page.
06
Image Audit
Full image inventory with alt text coverage report. Quickly spot which images are missing alt tags, have titles, or use lazy loading — critical for both SEO and accessibility.
07
Link Analysis
Complete link report showing internal, external, nofollow, sponsored, and new-tab links. One-click broken link checker surfaces dead internal links before they hurt your rankings.
08
Tools & Utilities
Export a full SEO report, copy all meta tags to clipboard, save page snapshots for before/after comparisons, generate structured data schema, and run a GSC search for the page.
09
Suggest a Feature
Have an idea that would make SEO Captain even more powerful? We build what our users need. Drop us a line with your feature request and help shape the roadmap.
Simple Setup
Start in Under 60 Seconds
No account. No onboarding. No configuration. Just install and start analyzing.
1
Install from Chrome Web Store
One click to add SEO Captain to Chrome. No login required.
2
Navigate to Any Webpage
Visit any page you want to analyze — yours, a competitor's, or a client's site.
3
Click the Extension Icon
The SEO Captain panel opens instantly with a full analysis of the current page.
4
Fix, Export, or Copy
Act on the insights directly — copy meta tags, generate new titles, or export the full report.
Who It's Built For
Made for People Who Care
About Getting Found
Whether you're optimizing a Shopify store, growing a content site, or auditing client pages — SEO Captain fits your workflow.
🛒
Shopify Founders
You can't afford to have product pages with weak meta titles or missing descriptions. SEO Captain helps you audit every page in seconds and fix what's costing you organic traffic.
- Spot missing meta tags on product pages
- Preview how listings appear on Google
- Check image alt coverage for all product images
✍️
WordPress Bloggers & Affiliate Marketers
Rankings depend on well-optimized content. SEO Captain lets you audit your own posts and benchmark against competing pages without switching tools.
- Check keyword density across any post
- Readability scoring for on-page content
- Find and fix broken internal links
🚀
Indie Hackers & Micro-SaaS Builders
You're moving fast and every page counts. SEO Captain gives you quick wins without needing an SEO specialist or an expensive subscription.
- Audit landing pages in under a minute
- Generate meta descriptions instantly
- Add schema markup without writing JSON-LD
💼
SEO Professionals & Agencies
Speed through page audits for multiple clients without logging into heavyweight platforms. Export reports, save snapshots, and hand over clear, visual findings.
- Export full SEO reports per page
- Snapshot history for before/after comparisons
- Analyze competitor pages during audits
🔍
SEO Enthusiasts
Curious about how search rankings work? SEO Captain turns every webpage into a learning lab — explore real on-page signals, experiment freely, and sharpen your skills without any tools to install or accounts to manage.
- Inspect on-page SEO for any site instantly
- Compare your pages against top-ranking competitors
- Learn what meta tags, headings, and schema actually do
📊
CMOs & Marketing Leaders
Get clear visibility into how your web presence holds up in search — without waiting on an agency report. SEO Captain gives you instant, executive-ready insights to ask the right questions and drive faster decisions.
- Spot critical on-page issues across key landing pages
- Benchmark your content against top competitors in seconds
- Share snapshot reports with your team or agency
What Users Say
Trusted by Founders & Marketers
From indie builders to agency teams — SEO Captain is part of the daily workflow for people who take on-page SEO seriously.
★★★★★
"I used to copy-paste titles into a spreadsheet to check lengths. SEO Captain just shows me everything I need right there in the browser. It's the kind of tool I didn't know I needed until I had it."
★★★★★
"The SERP preview alone is worth installing. I can see exactly how my posts look on Google before I publish — saves me so many edits after the fact. Plus the readability score helps me stay consistent."
★★★★★
"We use this for client audits all the time now. The export report is clean enough to send directly. It's replaced three different tools we were paying for. Zero setup, instant value."
Real Results
What Better On-Page SEO Does for Growth
Teams that systematically fix the issues SEO Captain flags see measurable improvements in organic visibility, click-through rates, and time-to-rank for new content.
3x
Faster page audit time vs manual checks
+42%
CTR improvement after fixing SERP snippets
100%
Alt text coverage achieved in one sitting
From the Blog
Go Deeper on On-Page SEO
Practical guides to help you get more out of every page you publish — written for founders and marketers, not SEO specialists.
🎯
📊
Meta Tags
How to Write Meta Titles and Descriptions That Actually Get Clicked
The practical difference between a title that ranks and one that earns clicks — and how to write both.
Read Article →🔗
Link Strategy
Internal Linking Done Right: Why Most Sites Get It Wrong
How internal link structure affects crawlability, authority distribution, and user navigation — and what to fix first.
Read Article →Common Questions
Frequently Asked Questions About SEO Captain
Is SEO Captain really free?
+
Yes. SEO Captain is completely free to install and use. There are no hidden tiers, no credit limits, and no API key required to access any of the features — including the title and description generator.
Does it work on any website, including competitor pages?
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Yes. SEO Captain analyzes the page currently open in your browser tab — whether it's your own site, a competitor's page, a client's website, or any publicly accessible URL. There are no restrictions on which sites you can audit.
How does the title and description generator work without an API?
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The generator runs entirely in your browser using JavaScript. It reads the existing page content and applies SEO best-practice rules locally to suggest optimized title and description variants — no external API call, no server processing, no data sent anywhere.
What does the SEO audit score check?
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The audit checks a range of on-page factors including: HTTPS status, title tag presence and length, meta description presence and length, H1 tag presence, canonical URL setup, and other key on-page signals. Each check returns a pass, warning, or fail with a short explanation of the issue.
Can I export the audit results to share with clients or teammates?
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Yes. The Tools tab includes an Export Report option that packages the full audit into a shareable format. You can also copy all meta tags to clipboard in one click, and save snapshots to track changes over time.
Does SEO Captain send my browsing data anywhere?
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No. SEO Captain processes all analysis locally in your browser. Page data is not sent to any external server. Your browsing activity remains private — the extension only reads the current tab's DOM when you open the panel.
Which browsers does SEO Captain support?
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SEO Captain is available as a Chrome extension. It works on all Chromium-based browsers including Google Chrome, Microsoft Edge, and Brave.
Start Auditing Any Page for Free
SEO Captain takes less than a minute to install. Open it on any webpage and get a full on-page SEO report — no account, no setup, no cost.
Add to Chrome — It's FreeAvailable on Chrome Web Store • No account required • Works immediately