SEO Tools Tools

Meta tags, schema, sitemaps, audits.

50 free seo tools tools — no sign-up, runs in your browser.

Reviewed by The Markvibe Team · Last updated 2026-06-28

The complete guide to seo tools

This page is the hub for everything seo tools on Markvibe. Meta tags, schema, sitemaps, audits. Every tool below runs in your browser — your files and text never leave your device. Use the cluster as a workflow: pick the tool that matches the job, then jump to a related one when the next step calls for it.

All SEO Tools Tools

Slug Generator

Create clean URL slugs from any text.

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Meta Tag Generator

Generate SEO meta tags for any page.

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Open Graph Generator

Generate Open Graph tags for social sharing.

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Sitemap Generator

Generate an XML sitemap.

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Schema Generator

Generate JSON-LD structured data.

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Canonical Tag Generator

Generate canonical link tags.

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Keyword Density Checker

Analyze keyword frequency.

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SERP Preview Tool

Preview your Google snippet.

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Text to URL Slug

Generate a clean URL slug from any text.

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SEO Title Length Checker

Check that your title fits Google's 30-60 char range.

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Meta Description Length Checker

Check that your description fits the 120-160 range.

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H1 Tag Counter

Count <h1> tags in any HTML — should be 1.

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Image Alt Text Counter

Audit which <img> tags have alt attributes.

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Anchor Text Extractor

Extract anchor text from links in any HTML.

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Canonical Tag Checker

Find the canonical URL in any HTML page.

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Backlink Checker

Note: backlink data needs a server API.

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Broken Link Checker

Note: scanning needs a server.

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Canonical Checker

Find canonical tag in HTML input.

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Description Length

Check meta description length.

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Domain Age Checker

Domain age requires WHOIS lookup.

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Google Cache Checker

Build Google cache URLs.

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Google Index Checker

Build Google site: search URLs.

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Heading Analyzer

Check H1-H6 outline from HTML.

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Headline Analyzer

Score a headline.

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Hosting Checker

Lookup host via WHOIS link.

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Hreflang Checker

Find hreflang tags in HTML input.

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Keyword Density

Keyword density checker.

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Link Analyzer

Checker.

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Meta Tag Analyzer

Analyze meta tags in HTML input.

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Meta Tags Generator

Generate SEO meta tags.

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Open Graph Checker

Parse OG tags from HTML input.

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Page Size Checker

Estimate page size from HTML input.

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Page Speed

Use PageSpeed Insights link generator.

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Readability Score

Estimate Flesch reading ease.

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Redirect Checker

Note: redirect check needs a server.

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Robots Txt

Generate a robots.txt.

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Robots Txt Validator

Validate robots.txt syntax.

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Server Status Checker

Server status needs server-side check.

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Spam Checker

Check text against common spam-word list.

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Ssl Checker

Open SSL Labs link for a domain.

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Structured Data Validator

Validate JSON-LD syntax.

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Title Length

Check SEO title length.

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Url Extractor

Extract URLs from text.

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Url Opener

Open many URLs at once.

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Url Rewriting

Apply find/replace to URLs.

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Url Shortener

Note: shortening needs a server; copy your long URL.

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Utm Builder

Build UTM-tagged URLs.

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Whois Domain Lookup

Use our WHOIS Lookup tool.

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Wordpress Theme Detector

Theme detect needs a server.

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World Clock

Show current time in major time zones.

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Keep going — these categories pair well with seo tools workflows.