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Free On-Page SEO Tools to Check, Generate and Fix Your Website

SeoToolz is a free collection of on-page SEO tools for checking, generating and auditing the signals search engines actually read — titles, meta tags, schema, sitemaps, robots.txt and more.

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Every tool you need for on-page SEO

Each tool runs instantly in your browser or on our server — real output, not a demo.

Website SEO Checker

Scan any URL for title, meta, headings, images and technical SEO issues.

Run checker →

XML Sitemap Generator

Paste your URLs and generate a valid, ready-to-upload sitemap.xml.

Generate sitemap →

Robots.txt Generator

Build a correct robots.txt with crawl rules and sitemap reference.

Generate robots.txt →

Meta Tag Generator

Create title, description, keyword and robots meta tags instantly.

Generate meta tags →

Open Graph Generator

Generate og:title, og:image and Twitter card tags for social sharing.

Generate OG tags →

Canonical Tag Generator

Generate a clean rel="canonical" link tag to avoid duplicate content.

Generate canonical tag →

Schema Generator

Build JSON-LD structured data for Articles, Products, FAQs and more.

Generate schema →

Keyword Density Checker

Paste your content and see keyword frequency and density instantly.

Check density →

Redirect Checker

Trace the full redirect chain and HTTP status codes for any URL.

Check redirects →

Mobile-Friendly Checker

Check viewport, tap-target and responsive signals for mobile SEO.

Check mobile-friendliness →

Why on-page SEO still matters in 2026

Search engines still rely heavily on the on-page signals in your HTML — title tags, meta descriptions, canonical URLs, structured data and crawl directives — to understand and rank your pages. SeoToolz brings the most-used on-page checks and generators into one fast, ad-supported toolkit so you can audit and fix these signals without installing anything.

From the blog

Guides and honest reviews to go with the tools above.

Guide