SeonixSeonix
Free · No signup · No limits

Free SEO and AI search tools

Check whether AI assistants can read and quote your pages, fix the tags search engines rely on, and generate the files crawlers look for. Every tool answers straight away — no signup, no limits, no results emailed to you later.

Opens the AI SEO Checker: crawler access, answer-ready content, trust signals and snippet basics in one pass.

Seonix Site Health dashboard: an overall score of 91 out of 100, SEO, technical, speed and AI search scores, and the list of issues to fix
Site Health checks every page for SEO, technical, speed and AI-search issues and marks which ones Seonix fixes for you.
On-page SEO

On-page SEO tools

The tags and the copy that decide how a page appears in search results — and whether anyone clicks it.

Meta Tag Checker

Title, description, canonical, robots and Open Graph — with Google and social previews.

Checks the live pageOpen tool

SERP Snippet Preview

See where Google cuts your title and description — measured in pixels, desktop and mobile.

Runs in your browserOpen tool

Keyword Density Checker

Count words and phrases, measure keyphrase density and spot keyword stuffing in any text or page.

Runs in your browserOpen tool
Technical SEO

Technical SEO and structured data

Markup, redirects and the plumbing that keep pages indexable and eligible for rich results.

Schema Markup Generator

Valid JSON-LD for Article, FAQ, HowTo, Product, LocalBusiness and breadcrumbs.

Runs in your browserOpen tool

Schema Markup Validator

Validate JSON-LD on any page: syntax errors, required properties, nested entities.

Checks the live pageOpen tool

Redirect Checker

Trace every hop of a redirect: status codes, Location targets, chains and loops.

Checks the live pageOpen tool
For your stack

SEO on autopilot for the site you have

Seonix researches, writes and publishes articles — and keeps the technical side in check — wherever your site lives.

WordPress sites

The free Seonix plugin connects in one click: articles publish as native posts, and SEO fixes and llms.txt are handled for you.

WordPress SEO automation

SaaS products

Your AI coding agent connects your app to Seonix from one prompt; keyword-backed articles then publish to your own domain on schedule.

SaaS SEO on autopilot

Custom-built websites

No WordPress needed: your site exposes one small endpoint and articles arrive as native pages in your own design.

SEO for custom websites
Also onShopifyWebflowWixGhost

Questions about the free tools

Are these SEO tools really free?

Yes. No signup, no usage limits, nothing to install. They are free because they are useful on their own; Seonix — the platform that runs SEO on autopilot — is the paid product.

What is the difference between GEO and AEO?

Generative engine optimization (GEO) means making content that AI models such as ChatGPT and Gemini can find, understand and cite. Answer engine optimization (AEO) means structuring a page so an engine can lift a direct answer from it — a featured snippet, an AI Overview or a voice answer. In practice they overlap: crawlable pages, clear answers, structured data and trust signals serve both.

Do you store the pages or text I check?

No. Tools marked "Runs in your browser" never send what you type anywhere. Tools that check a live page fetch the public URL from our server, return the result and do not save the page or its content.

Which tool should I start with?

The AI SEO Checker. Give it one URL and it tells you whether AI crawlers may fetch the page, whether its text is readable without JavaScript, and what to fix first — with links to the specialised tools for anything it flags.

Can these tools fix the problems they find?

They show exactly what to change; making the change is up to you. If you would rather not go page by page, Seonix audits the whole site for free, suggests the fixes — and applies many of them automatically on WordPress — and publishes new articles that already pass these checks.

Beyond one page

From a one-off check to SEO that runs itself

These tools fix one page at a time. Seonix runs the whole loop for your site: it finds what your buyers search, writes and publishes the articles, and tracks how you show up in Google and in AI answers.

Analyze my site freeHow Seonix works