AI-Powered SEO Tool

AI Content Optimizer

Paste your content or fetch from a URL. Choose your target market, auto-detect keywords with real search volumes, connect Google Search Console for ranking data, then get AI-powered optimization suggestions.

Last updated: March 2026

💡 API key → Settings

10 credits per day

Optional: real clicks, impressions & rankings for AI-powered content optimization

How this AI content optimizer works

Writing good content isn't enough if the keywords are wrong or the structure is off. This free content optimizer grades your text from A+ to F based on keyword density, readability, content length, and structural signals. Auto-detect pulls the best target keywords from your content with real search volumes for your selected market, so you can see whether you're optimizing for the right terms.

Hit AI Optimize and you get specific rewrite suggestions, meta tag drafts, and a keyword coverage map. It's the difference between "this page needs work" and "here's exactly what to fix and why."

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FAQ

How does the scoring work?+

The content score combines keyword density (ideal: 1–3%), readability (Flesch-Kincaid), content length (300+ words recommended), and sentence variation. Higher scores indicate better on-page SEO alignment for your target keyword.

Is the AI analysis free?+

Yes. You get 10 free AI queries per day (shared across all AI features). For unlimited use, enter your own OpenAI API key. The client-side analysis (word count, density, readability) always works without limits.

How does the AI optimization work?+

The AI analyzes your content against your target keyword, evaluating keyword placement, semantic relevance, readability, and structure. It then generates specific suggestions to improve on-page SEO without keyword stuffing.

What keywords should I target?+

Choose one primary keyword per page that matches user search intent. Long-tail keywords (3-5 words) typically have less competition. The tool works best when you enter the exact phrase users would type into a search engine.

Does this tool support multiple languages?+

Yes. The readability and keyword density analysis works with any language that uses spaces between words. AI-powered suggestions are available in all languages supported by the underlying model.

AI content tools in your browser

The Lumina extension includes AI content optimization, keyword research, and more — directly in your toolbar.

Add Lumina to Chrome — Free