Free Online SEO Tools

Generate meta tags, robots.txt, sitemaps, schema markup, and analyze your pages for SEO — all free, all in your browser.

21 free tools available
21+
Free Tools
100%
Browser-Based
0
Data Uploaded
39
Guides
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Meta Tag Generator

Generate perfect meta title, description, and keyword tags for your pages.

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Robots.txt Generator

Create a robots.txt file to control how search engines crawl your site.

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Sitemap Generator

Generate XML sitemaps from a list of URLs for search engine submission.

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Open Graph Checker

Preview how your page looks when shared on social media.

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Keyword Density Analyzer

Analyze keyword frequency and density in your content.

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Heading Structure Checker

Analyze heading hierarchy (H1-H6) from HTML for proper SEO structure.

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Redirect Checker

Check URL redirect chains and final destination status codes.

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Schema Markup Generator

Generate JSON-LD structured data for articles, products, FAQs, and more.

Page Size Analyzer

Estimate page weight and loading performance from HTML content.

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Link Extractor

Extract all links from HTML and analyze anchor text distribution.

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Link Extractor

Extract all links from a webpage. Analyze internal vs external links and anchor text.

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Page Size Analyzer

Analyze webpage size and resource breakdown. Measure page weight for performance.

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Schema Markup Generator

Generate Schema.org JSON-LD structured data for better SEO and rich snippets.

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Broken Link Checker

Find broken links on any webpage.

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Content Readability

Analyze text readability with Flesch score.

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Domain Age Checker

Check when a domain was first registered.

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Favicon Checker

Check if a website has proper favicon setup.

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Keyword Suggestion

Generate keyword ideas from a seed keyword.

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Mobile Friendly Check

Test if a page is mobile-friendly.

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Word Counter

Count words, characters, sentences, and paragraphs.

🎯 SEO Tip: Check your site's meta tags and structured data regularly

Why SeoIO?

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100% Privado

Todas as ferramentas rodam no seu navegador. Nenhum dado é enviado para servidores.

Resultados Instantâneos

No waiting, no loading. Process data in milliseconds.

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Grátis para Sempre

21 ferramentas, custo zero. Sem cadastro, sem limites.

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Funciona em Todo Lugar

Desktop, tablet, celular. Qualquer navegador moderno, qualquer dispositivo.

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About SeoIO

SeoIO (seo-io.com) is a free online tool suite offering 19 SEO and digital marketing tools — meta tag generators, keyword analyzers, sitemap tools, and more. All tools run entirely in your browser — no data is uploaded to any server, ensuring complete privacy. No registration or signup required.