Lumina – Free All-in-One SEO & GEO Chrome Extension

No setup needed

Works instantly on any page

Open the extension, get results. No API keys, no login, no limits. These features work out of the box.

📊

On-Page SEO Audit

Title, meta description, canonical, robots, X-Robots-Tag, HTTP status — with live editable SERP preview and pixel-width measurement.

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Indexation Alarm

Extension icon turns green, yellow, or red based on indexability. See the status without opening the popup.

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Heading Structure

H1–H6 heading tree with structural error detection. Highlight headings on the live page with color-coded badges.

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Link Analysis

Extract all links. Check for broken URLs, redirects, nofollow/dofollow. On-page highlighting with color codes.

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Crawling & Indexing

Robots.txt parser with syntax highlighting, sitemap detection, URL-in-sitemap check, hreflang validation with return-tag verification.

⚙️

Schema Validation

JSON-LD extraction and deep validation — checks actual page content against schema data, not just syntax.

🖼️

Image SEO

Missing ALT tags, oversized files, format analysis (WebP, JPG, PNG), lazy loading detection. Export as CSV.

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JS vs No-JS Comparison

See what content disappears without JavaScript — words, headings, links, schemas. Critical for understanding what AI crawlers see.

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Social & Open Graph

Open Graph title, description, image preview. Twitter Card analysis. Verify how your page looks when shared.

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Full-Page Screenshots

Desktop, phone (390px), and tablet (834px) with automatic stitching. Perfect for client reports and audits.

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Local Search Simulation

Search Google from any city (DE, AT, CH, and more) using UULE parameters. No VPN needed.

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Keyboard Shortcuts

Press 1–9 for tabs, ? for help. Built for speed. Dark mode included.

Generative Engine Optimization

Built for the AI search era

Lumina is one of the first SEO extensions with dedicated GEO features. Understand how AI engines see your content — and optimize for them.

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AI Crawler Access Check

See which AI bots (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, DeepSeekBot) are allowed or blocked via robots.txt — with live server verification.

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llms.txt Checker

Verifies if the site has an llms.txt file that guides AI crawlers on what content to index and how to cite the site. Checks both llms.txt and llms-full.txt.

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AI Traffic Dashboard

See how much traffic comes from ChatGPT, Perplexity, Claude, Gemini, and Copilot — with per-platform breakdown, trend chart, and conversion comparison. Requires GA4.

Connect your API keys

Power features — free to unlock

90% of Lumina works without any setup. Connect your own API keys to unlock AI tools, keyword research, and live search data. Your keys, your data.

FREE GOOGLE OAUTH

Google Search Console

Full GSC dashboard inside the extension.

Clicks, impressions, CTR, position with comparison chart
Top queries and pages with volume enrichment
Keyword cannibalization detection
Winners/losers and low-hanging fruit analysis

FREE GOOGLE OAUTH

Google Analytics 4

Complete GA4 dashboard with period comparison.

Sessions, users, engagement rate, conversions
Sources, pages, countries, devices breakdown
User journeys and exit page analysis
GSC × GA4 cross-reference

DATAFORSEO API KEY

Keyword Research & SERP

Live keyword data and SERP analysis.

Search volume, CPC, competition, trend sparklines
Related and long-tail keyword suggestions
Live SERP checker with feature detection
Target keyword tracking per URL

OPENAI API KEY

AI-Powered SEO Tools

SEO copilot with full page + data context.

Content optimizer with competitor analysis
Meta title & description generator with SERP preview
Schema JSON-LD generator with site-wide data
SEO localization and content translation

How Lumina compares

More features. Zero cost.

Lumina combines features that usually require multiple paid tools — in one free extension.

Feature	Lumina	Detailed SEO	SEOquake	Rank-O-Saur
On-page SEO audit	✓	✓	✓	✓
Live editable SERP preview	✓	—	—	—
Schema deep validation	✓	—	—	basic
AI crawler check (robots.txt)	✓	—	—	✓
llms.txt checker	✓	—	—	✓
AI Traffic Dashboard	✓	—	—	—
Google Search Console	✓	—	—	—
Google Analytics 4	✓	—	—	—
Keyword research	✓	—	paid	Sistrix
AI content tools	✓	—	—	—
JS vs No-JS comparison	✓	—	—	✓
Full-page screenshots	✓	—	—	—
Price	Free	Free	Freemium	Free

Frequently asked questions

Got questions?

Is Lumina really free?+

Yes. Lumina is 100% free with no account required. Most features work instantly without any setup. Some advanced features (keyword research, AI content tools) use your own API keys from third-party providers — you only pay what you use directly to them.

What is GEO (Generative Engine Optimization)?+

GEO is the practice of optimizing your content for AI-powered search engines like ChatGPT, Perplexity, Claude, and Google's AI Overviews. Lumina helps you check which AI crawlers can access your site, verify your llms.txt file, and track AI-driven traffic through your GA4 data.

Does Lumina collect my data?+

No. All analysis happens locally in your browser. Lumina has no backend server, no analytics, and no tracking. API keys and OAuth tokens are stored in Chrome's local storage on your device. Read the full privacy policy for details.

Do I need API keys to use Lumina?+

No. Over 90% of features work without any keys — on-page audits, heading analysis, link checking, schema validation, robots.txt parsing, llms.txt checking, hreflang validation, JS vs No-JS, screenshots, and more. API keys unlock keyword research (DataForSEO), AI content tools (OpenAI), and live GSC/GA4 data (free Google OAuth).

What permissions does Lumina need and why?+

Lumina needs activeTab and tabs to read the current page, webRequest for HTTP headers, scripting for on-page features like heading highlighting, and host_permissions for robots.txt fetching and API calls. All permissions are explained in the privacy policy.

Ready to see your site
through AI eyes?

Install Lumina in 3 seconds. No account. No payment. No limits.

Add to Chrome — Free