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24 free SEO tools

Enter a URL and get the answer. Every tool here works on a live page, most work on a whole list of them, and none of them ask for an account.

Technical SEO

Check how search engines crawl, follow, and index your pages.

Robots.txt Tester

Fetch any site's robots.txt, validate it, and test whether a URL is blocked for Googlebot, Bingbot, or an AI crawler.

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Robots.txt Generator

Build a valid robots.txt from presets, including rules for the AI crawlers.

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XML Sitemap Validator

Fetch a sitemap, follow its index files, and check every URL, tag, and limit against the protocol.

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Bulk
Redirect Checker

Trace the full redirect chain for one URL or a whole list, and find the chains and loops that leak link equity.

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Broken Link Checker

Crawl every link on a page and report which ones are dead, redirected, or blocked.

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Bulk
HTTP Header Checker

Inspect the response headers of any URL, including caching, security, and the x-robots-tag that quietly deindexes pages.

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Hreflang Checker

Validate the hreflang annotations on a page, including return links, language codes, and the x-default.

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Bulk
Canonical Tag Checker

Check the canonical URL on one page or a list of them, and find the self-references, mismatches, and chains.

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llms.txt Generator

Generate an llms.txt from your sitemap so AI assistants can read your site the way you intend.

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On-page SEO

Tune the tags and snippets that decide whether a result gets clicked.

SERP Preview

See exactly how a page appears in Google on desktop and mobile, measured in pixels the way Google truncates it.

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Bulk
Meta Tag Checker

Pull the meta tags from any page, or a list of pages, and score every title and description against what Google shows.

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Open Graph Preview

Fetch a page's social tags and preview the card it produces on Facebook, X, LinkedIn, Slack, and WhatsApp.

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Heading Analyzer

Pull the heading outline from any URL and find the missing H1s, skipped levels, and empty headings.

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Image Alt Text Checker

List every image on a page with its alt text, and find the ones that are missing, name a single word, or are a file name.

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Bulk
URL Slug Generator

Turn any title into a clean URL slug, one at a time or a whole list at once.

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Content analysis

Measure the words on the page before you publish them.

Word Counter

Count words, characters, sentences, and reading time, in your own text or on any published page.

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Readability Analyzer

Score any text or URL on Flesch-Kincaid and four other formulas, and see the sentences dragging the grade up.

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Keyword Density Checker

Analyze one-, two-, and three-word phrase frequency on any URL, and see where you have over-optimized.

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Structured data

Build and validate the markup that earns rich results.

Schema Markup Generator

Generate valid JSON-LD for articles, products, FAQs, how-tos, local businesses, events, and more.

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Structured Data Validator

Pull the JSON-LD from any URL and check it for the required properties each rich result needs.

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Keyword research

Turn a keyword list or a topic into a plan you can publish against.

AI
Keyword Clustering Tool

Paste a keyword list and group it into the clusters a single article can rank for, each with a suggested target.

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AI
Topical Map Generator

Turn one seed topic into a full topical map of pillars and supporting articles, ready to publish against.

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AI
Content Brief Generator

Turn a target keyword into a writer-ready brief: intent, the heading and meta tags, the outline, and the entities to cover.

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AI
Meta Description Generator

Write five meta descriptions for any URL, each inside Google's pixel limit and built around the keyword you target.

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Built for people looking after more than one site

Most free SEO tools ask you to paste something in. That is fine for a single check and useless the moment you are looking after ten sites, because the thing you want to know is almost never about text you already have in your clipboard. It is about a page that is live right now, on a domain you did not build, doing something you did not expect.

So these take a URL. The robots.txt tester fetches the live file and tells you which crawlers it actually lets through. The meta tag checker takes fifty URLs and returns the titles that are too long in pixels rather than characters. The redirect checker traces a hundred URLs through their chains at once. Every one of them exports to CSV, because the table is usually the beginning of the work rather than the end of it.

The tools that need judgment rather than a fetch use a language model: clustering a keyword list into the articles that should exist, turning a subject into a topical map, or writing five meta descriptions for a page it has read. Those are the parts of SEO that used to need an afternoon and a spreadsheet.

Frequently Asked Questions

Are these tools really free?

Yes. Every tool on this page runs without an account, without a trial, and without a limit on how many times you use it. Nothing you enter is stored. The tools that fetch a URL do so live at the moment you ask, and the tools that run a language model are rate limited per minute to keep them available, which is the only cap you will meet.

Do I need to sign up?

No. There is no sign-up, no email wall, and no export gated behind an account. RankYak is a paid product, and these tools exist because the people who need them are the people who eventually need the product; putting a form in front of them would defeat the point.

Which tools work on a whole list of URLs?

The meta tag checker, redirect checker, HTTP header checker, canonical checker, and URL slug generator all take a list. They are marked "Bulk" on their cards above. Each one exports to CSV, which is usually the point: the table is the fix list.

Can I use these for client sites?

Yes, on any site you have permission to work on. The tools fetch public pages the same way any browser or crawler does, so there is nothing to install and nothing to verify. The bulk tools and the CSV exports exist because the people using them are usually looking after more than one site.

How is this different from paid SEO tools?

These do the checks a person runs on a specific page at a specific moment: is this blocked, does this redirect cleanly, is this title too long, is this markup valid. A paid crawler runs all of that across a whole site on a schedule and keeps the history. Both are useful, and for a single question the free version is usually faster.

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