SEO Content Analysis Tool

Paste your content and instantly see word count, keyword density, heading structure, and readability — with clear, actionable recommendations for search and AI answer engines. 100% free, runs in your browser, nothing is uploaded.

How to use this SEO content analysis tool

Great content wins in both Google and AI answer engines when it is genuinely useful, well-structured, and easy to extract. This tool checks the fundamentals: depth (word count), structure (one H1, frequent H2s), keyword placement and density, and readability. Aim for a single H1, an H2 roughly every 300 words, a target-keyword density around 0.5-1.5%, and short, scannable sentences that lead with a direct answer.

For the strategy behind the numbers, read our guides on refreshing and pruning content, topic clusters and pillar pages, and schema markup for AI search. If you would rather we do it, explore our content marketing and Answer Engine Optimization (AEO) services, or try our free table of contents generator.

Frequently asked questions

What is a good keyword density for SEO?
A healthy target-keyword density is roughly 0.5-1.5%. Higher than about 2.5% risks keyword stuffing, which is ineffective for SEO and actively reduces AI-search visibility. Focus on natural placement in the title, intro, and headings rather than a target number.
How do you analyze content for SEO?
Check length and topical depth, heading structure (one H1, frequent H2s), target-keyword placement and density, readability (short sentences, clear wording), and whether each section leads with a direct, extractable answer for AI search. This free tool measures all of these instantly.
How many words does a page need to rank?
There is no threshold. Depth should match the query: a definition needs a few hundred words, a comparison or how-to usually needs more. This tool reports word count so you can judge it against the pages already ranking.
Does readability affect SEO?
Not as a direct ranking factor, but it affects whether people stay and whether an AI engine can extract a clean answer. Short sentences that lead with the answer are easier to quote, which is what earns citations.
What does the tool check for AI answer engines?
Structure that makes content extractable: a single H1, frequent H2s, and answer-first paragraphs. AI engines quote self-contained passages, so a direct answer near each heading is what gets cited.
Is my text sent to a server?
No. The analysis runs entirely in your browser and nothing is uploaded, which is why it works offline.