SEO Audit Hub — Every Technical & On-Page Check, Free
An SEO audit is a systematic review of the technical and on-page signals that decide whether a page can be crawled, indexed and ranked. This hub groups every free audit tool on SEOAcademys into one workflow so you can move from discovery to fix without switching products.
Start with the full audit for a 47-signal overview, then use the focused checkers below to confirm each fix. Every tool fetches the live URL server-side, exactly as a crawler would, and stores nothing.
Last Updated: June 2026 · Reviewed by SEOAcademys Editorial Team
Which tool should you run first?
Full SEO Audit
Run a free 47-point SEO audit on any URL. Checks meta tags, headings, schema markup, Core Web Vitals, HTTPS, canonical URLs, AI crawler access. No signup. Results in 2 seconds.
Open tool →Meta Tag Checker
Check all meta tags on any URL instantly. Verifies title length, meta description, Open Graph (og:title, og:image), Twitter Cards, viewport, robots directives. Free.
Open tool →Heading Structure Checker
Check any URL's heading hierarchy. Find missing H1s, skipped heading levels, multiple H1 errors. Visualize H1-H6 outline. Free heading structure analyzer.
Open tool →Canonical URL Checker
Check canonical tags on any URL. Detect missing canonicals, redirect-chain canonicals, cross-domain canonicals. Prevent duplicate content SEO problems. Free.
Open tool →Robots.txt Checker
Validate your robots.txt file. Tests rules for Googlebot, Bingbot, GPTBot, OAI-SearchBot, PerplexityBot, ClaudeBot — 14 crawlers. Prevent accidental AI citation blocking. Free.
Open tool →Sitemap Checker
Validate any XML sitemap. Checks syntax, URL accessibility, lastmod dates, file size limits. Find errors blocking Googlebot indexing. Free sitemap validator.
Open tool →Redirect Chain Checker
Trace redirect chains for any URL. Shows HTTP status codes (301, 302, 307, 308), hop count, redirect loops, and latency. Free URL redirect checker.
Open tool →HTTP Headers Checker
Inspect HTTP response headers for any URL. Checks cache-control, content-type, X-Robots-Tag, security headers (HSTS, CSP), compression, server software. Free.
Open tool →SSL / HTTPS Checker
Check any domain's SSL certificate. Verify expiry date, TLS version (1.3 recommended), certificate chain, HSTS header. HTTPS is a confirmed Google ranking factor. Free.
Open tool →Mobile-Friendly Checker
Test any URL for mobile usability. Checks viewport, touch targets, font sizes, content width, Core Web Vitals (LCP, CLS, INP). Google mobile-first indexing compliance. Free.
Open tool →Page Size Analyzer
Analyze any webpage's size. Breaks down weight by HTML, CSS, JavaScript, images, fonts. Identify bloat causing slow LCP. Free page size and performance analyzer.
Open tool →Broken Link Checker
Find broken links (404 errors, server errors, timeouts) on any webpage. Live crawl. Fix dead links before they damage SEO and user experience. Free broken link checker.
Open tool →What order should you run an SEO audit in?
Fix crawlability before content. A perfect page that a crawler cannot reach earns nothing.
Work through the four layers in sequence, re-checking after each change.
- Access layer: robots.txt, HTTP status, HTTPS and redirects
- Index layer: canonical tags, sitemap coverage and meta robots directives
- Content layer: title, meta description, heading hierarchy and internal links
- Experience layer: mobile viewport, page weight and Core Web Vitals
How often should a site be audited?
Audit the full site quarterly, and audit any page you edit on the day you publish it.
Run the access-layer checks immediately after every deployment, since most catastrophic SEO regressions are introduced by a config change rather than a content change.
What does a free audit miss compared with paid crawlers?
Paid crawlers walk thousands of URLs and store history. These tools audit one URL at a time in real time.
For most sites the signals are identical — the difference is scale and reporting, not accuracy.
Frequently asked questions
What is an SEO audit?
An SEO audit is a structured review of the technical, on-page and content signals that determine whether search engines can crawl, index and rank a page. It produces a prioritized list of fixes rather than a single score.
Is this SEO audit hub really free?
Yes. Every tool linked here is free, requires no signup and has no usage cap.
Which audit tool should I run first?
Run the Full SEO Audit first for a 47-signal overview, then use the focused checkers to fix and verify each issue it reports.
How long does an audit take?
A single-URL audit completes in a few seconds. A full manual pass across the layers described above typically takes 30 to 60 minutes for a small site.
Do these tools work on competitor sites?
Yes. Any publicly accessible URL can be audited, which makes side-by-side comparison straightforward.