Free SEO Tools Online: 40+ Checkers and Generators

Kwebby's free SEO tools cover the checks most sites need: backlinks, keywords, meta tags, sitemaps, speed, domains, security and full site reviews. The hub says you need no account to use them. Pick the tool for the problem in front of you, run it on a live URL and fix what it finds. This page lists every tool by job, shows a simple audit workflow and explains how to use link tools without breaking Google's rules.

Key Takeaways

• Kwebby offers 40+ free SEO tools in eight groups: links, keywords and content, meta and schema, crawling and indexing, speed and mobile, domains, security, and audits.
• The hub says no account is needed. Check each tool page for any usage limit.
• Start with the Website Reviewer for a broad scan, then use a specialist tool on each problem it finds.
• Free tools estimate and sample data. Confirm important numbers in Google Search Console before you change a live site.
• No tool guarantees rankings, and links should come from real, relevant placements.
• Mass or paid link schemes can break Google's spam policies, so treat backlink generators with care.

Backlink and Link Tools

These tools check, build, clean and measure links. Read the responsible use section below before you use the generators.

• Backlink Checker: See referring domains, anchor text and link types for any domain.
• Backlink Maker: Submit your site to a set of web directories.
• YouTube Backlinks Generator: Build links to a YouTube video from embedder sites and video portals.
• YouTube Shorts Backlinks Generator: Do the same for a YouTube Short.
• Disavow File Generator: Format a disavow.txt file for Google.
• Link Price Calculator: Estimate a fair price for a sponsored or guest post link.
• Broken Links Finder: Scan a page for links that return 404 or other errors.
• Website Links Count Checker: Count internal and external links and see the dofollow and nofollow split.
• UTM Link Tracker: Build UTM tracking URLs for Google Analytics campaigns.
• Bulk URL Shortener: Shorten up to 10 URLs at once with TinyURL.

Keyword and Content Tools

• Keywords Suggestion Tool: Get 30 keyword ideas from one seed term, including long-tail and question-based ideas.
• Keyword Position Checker: Find where your site ranks in Google's top 30 results for a keyword.
• Keyword Density Checker: Measure keyword frequency and density to spot over-optimized or missing terms.
• Plagiarism Checker: Scan your text against the web for matching sources.
• Code to Text Ratio Checker: Compare the visible text on a page to the amount of HTML code.

Meta Tag and Schema Tools

• Meta Tag Generator: Create title, description, Open Graph, Twitter Card and robots tags.
• Meta Tags Analyzer: Read the meta, Open Graph and Twitter Card data of any URL.
• Open Graph Generator: Build Open Graph tags and preview how a page looks when shared.
• Open Graph Checker: Check the Open Graph tags on a live URL.
• Schema Markup Generator: Create JSON-LD for Article, Organization, Product, FAQ, BreadcrumbList and more.

Crawling and Indexing Tools

• XML Sitemap Generator: Build a valid sitemap with priority, change frequency and last modified dates.
• Robots.txt Generator: Write crawler rules that allow or block specific bots.
• Google Index Checker: See whether your pages appear in Google's index.
• Google Cache Checker: View Google's cached copy of a page and when it was last crawled.
• WWW Redirect Checker: Trace a redirect chain, its status codes and the final destination.

Speed and Mobile Tools

• Page Speed Checker: Get Google PageSpeed Insights scores and Core Web Vitals for mobile and desktop.
• Page Size Checker: Check HTML size and the count of CSS, JavaScript and image files.
• Mobile Friendly Test: Test how well a page works on mobile devices.

Domain and Hosting Tools

• Domain Age Checker: Find a domain's registration date, age and expiry from WHOIS data.
• Bulk Domain Age Checker: Check the age of many domains at once.
• Domain Availability Checker: Test whether a name is free to register across several extensions.
• Domain Hosting Checker: Find the hosting provider, nameservers, IP address and registrar.
• WHOIS Checker: Look up registration, expiry, nameserver and status data.
• SSL Checker: Read a certificate's expiry date, issuer, protocol and cipher.

Security and Reputation Tools

• Blacklist Lookup: Check whether an IP address appears on major DNS blacklists such as Spamhaus.
• Suspicious Domain Checker: Check whether a domain is flagged for malware, blacklisted by spam filters or not resolving.
• Google Malware Checker: Check a URL against Google Safe Browsing for malware and phishing.
• Email Privacy Checker: Scan a page you own for plain-text email addresses that spammers can harvest.

Audit and Comparison Tools

• Website Reviewer: Audit SEO, SSL, compression, security headers, meta tags and page size in one scan.
• Site vs Site Comparison: Compare two websites side by side on SEO metrics, speed, server info and SSL.
• WordPress Theme Detector: Detect which theme and plugins a WordPress site uses.

A Simple SEO Check Workflow

Work in a short loop: scan, fix, verify. This order catches the biggest problems first.

1. Scan the site. Run the Website Reviewer on your home page and note the failed checks.
2. Fix access problems. Use the Google Index Checker, Robots.txt Generator and XML Sitemap Generator so search engines can reach your pages.
3. Fix page tags. Test your tags with the Meta Tags Analyzer and the Open Graph Checker, then correct them with the generators.
4. Fix speed. Run the Page Speed Checker, then shrink images with the Image Optimizer and minify code with the CSS Minifier.
5. Check links. Use the Broken Links Finder and the Backlink Checker.
6. Verify. Re-run the same tools after your changes and confirm the key numbers in Google Search Console.

Use Link Tools Responsibly

Links should come from real, relevant places. Google's spam policies define link spam as creating links to or from a site primarily to manipulate search rankings. They list buying or selling links for ranking purposes and using automated programs or services to create links among the examples. Google adds that sponsored links are fine when you mark them with rel="sponsored" or rel="nofollow".

That advice shapes how to use these tools:

• Backlink generators: No tool guarantees a ranking. Treat directory and video portal links as a small supporting step, never a main strategy.
• Link Price Calculator: The price it shows is an estimate. If you buy a link, mark it as sponsored.
• Disavow File Generator: Google says most sites do not need the disavow tool and that misusing it can hurt performance. Try to remove bad links first.

The Limits of Free SEO Tools

Free tools give fast signals, not final answers. Two tools can report different numbers for the same page because they sample data differently. Use these results to find problems, then confirm what matters in Google Search Console. For a step-by-step task list, use the SEO Checklists. For other jobs, browse All Tools, the Text Tools and the Developer Tools.

Final Thoughts

Free SEO tools work best as a loop: scan, fix, verify. Open the Website Reviewer, pick the one problem that matters most and fix it before you move on. When a task needs hands-on help, you can contact the Kwebby team.