Free SEO audit tool
Crawl your website with a real browser, uncover technical SEO issues, and get a prioritized fix list. SpiderDog's free SEO audit tool is the fastest way to see what is holding your site back in search. It is designed for site owners, marketers, and agencies who want actionable results without committing to a paid plan first.
What the free audit checks
Broken links
Find 404 errors, redirect chains, and unreachable pages across your entire site.
Title tags & meta descriptions
Spot missing, duplicate, or incorrectly length titles and descriptions that hurt click-through rates.
Heading structure
Detect skipped heading levels, multiple H1 tags, and empty headings that confuse search engines.
Indexability
Catch noindex tags, canonical errors, hreflang issues, and robots.txt conflicts.
Core Web Vitals
Measure LCP, INP, and CLS on every audited page with Lighthouse-powered signals.
Image SEO
Identify missing alt text, oversized images, and legacy formats that slow down your pages.
Who the free SEO audit is for
The free audit is ideal for small business owners, freelancers, and marketing teams who want a fast, objective view of their site's technical health. You do not need an SEO background to understand the results. Every issue is explained in plain English, ranked by severity, and linked to the exact URL where it was found.
Agencies can also use the free plan to evaluate SpiderDog before recommending it to clients. The audit output uses the same engine as paid plans, so what you see in the free tier is representative of the full platform.
A website SEO audit that checks everything
SpiderDog is more than a free SEO audit tool. It is a free website SEO tool that runs complete website SEO audits from a real browser. Enter any URL, choose mobile or desktop crawling, and get a clear health score plus a prioritized fix list.
Whether you need a quick website SEO audit for a single landing page or a full-site crawl, SpiderDog surfaces the same technical issues enterprise platforms charge hundreds to find.
How it works
Enter your URL
Paste any website URL and choose mobile or desktop crawling.
Crawl your site
Playwright renders JavaScript and follows internal links just like Googlebot.
Get your report
Review issues by severity, see exact URLs, and export the results.
Frequently asked questions
Is the SpiderDog SEO audit really free?
Yes. The Free plan includes a limited number of audits every month with no payment information required. You only upgrade when you need larger crawls, scheduled monitoring, or PDF exports.
Do I need a credit card to start?
No. Create an account, enter your URL, and run your first audit in minutes.
What types of websites can I audit?
SpiderDog works on any public website you own or have permission to crawl, including JavaScript-heavy sites built with React, Vue, or Angular.
How long does a free audit take?
Most small sites finish in under 10 minutes. Larger sites scale based on your plan limits.
Ready to fix your SEO?
Join teams using SpiderDog to catch technical issues before they hurt rankings. Start with a free audit today.
Create free account