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SEO Tools Calculators — SEO

21 free seo tools calculators in seo & marketing. Each tool shows step-by-step formulas, worked examples, and detailed explanations to help you get accurate results instantly.

All SEO Tools Calculators

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301 Redirect Mapper

Plan and generate 301 redirect mappings for site migrations and URL changes.

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Canonical URL Generator

Generate canonical URL tags to prevent duplicate content issues in search engines.

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Domain Authority Checker

Check and compare domain authority scores for competitive SEO analysis.

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Hreflang Tag Generator

Generate hreflang tags for multilingual and multi-regional websites.

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Keyword Density Checker

Analyze keyword density and frequency distribution in any webpage or text content.

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Meta Tag Length Checker

Verify that title tags and meta descriptions fit within Google SERP display limits.

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Open Graph Tag Generator

Generate Open Graph and Twitter Card meta tags for social media sharing optimization.

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Robotstxt Generator

Generate a robots.txt file with crawl directives for search engine bots.

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Schema Markup Generator

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

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Xml Sitemap Size Calculator

Estimate XML sitemap file size and check if it exceeds the 50MB/50K URL limits.

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Content Brief & SEO Outline Generator

Create data-driven content briefs with keyword analysis and structure

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DevOps Incident Postmortem Generator

Generate structured postmortems with root cause analysis (5 Whys) and action items

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Incident Response Tabletop Generator

Generate cybersecurity tabletop exercise scenarios for IR planning

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Keyword Cluster Topical Authority Planner

Plan keyword clusters and build topical authority with content gap analysis and authority scoring

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Password Generator

Generate secure random passwords

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Cookie Banner Text Generator

Generate GDPR and CCPA compliant cookie banner and privacy policy text

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Support Ticket Triage Priority Score Generator

Calculate support ticket priority scores for automated triage and consistent prioritization

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Truth Or Dare Generator

Generate results with the Truth Or Dare Generator — set your parameters and get cryptographically-random output instantly.

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Yes No Generator

Generate results with the Yes No Generator — set your parameters and get cryptographically-random output instantly. Free, runs in browser, no data.

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QR Code Generator

Create QR codes for any text or URL

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Random Number Generator

Generate random numbers

About SEO Tools Calculators

Our seo tools calculators in seo & marketing are designed for students, professionals, and anyone who needs quick, accurate results. Every calculator includes the underlying formula, step-by-step solutions, and real-world worked examples so you can understand the math behind the answer.

Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common seo tools scenarios. All results are computed in your browser — no data is sent to any server.

What You Can Calculate

This section includes 21tools: 301 Redirect Mapper, Canonical URL Generator, Domain Authority Checker, Hreflang Tag Generator, Keyword Density Checker, Meta Tag Length Checker, Open Graph Tag Generator, Robotstxt Generator, and 13 more. Each calculator is free to use with no signup required.