Free International SEO Audit Tool
Paste one localized page's rendered HTML and check its language, hreflang, canonical, and fallback signals before international pages split their relevance across regions.
- Checks hreflang codes and duplicates
- Finds missing self-reference and x-default
- Compares canonical and page URLs
- Runs in your browser
Localized page markup
International SEO Audit
International SEO audit
Generated result
International SEO audit Alternate links found: 3 Canonical URL: https://example.com/ HTML lang: en No structural issues found in the pasted markup. This browser audit checks one rendered page. It cannot verify reciprocal return links, redirects, or whether Google selected the canonical.
Where this tool fits
How to use the international seo audit
What an international SEO audit checks
International SEO fails most often through conflicting signals: a missing HTML language, incomplete hreflang set, canonical pointing at another locale, or alternate URLs that are not absolute and indexable. This audit checks the markup a crawler receives on one page and turns those structural mistakes into a short review list.
Why self-reference and return links matter
Every localized page should list itself and its alternates. The other pages must return the same relationship, though a single-page browser audit cannot fetch them safely. Use this result as the first half of the check, then validate the complete set and its redirects in a crawl.
Canonical and hreflang work together
Each locale should normally have a self-referencing canonical and a complete hreflang set. A canonical from the French page to the English page tells search engines that the French URL is not the preferred page; that can erase the very international variant you want indexed.
International SEO Audit FAQ
Is the international SEO audit free?
Yes. The international SEO audit is free to use on Seobase with no signup required for the on-page international markup check.
Can I use the international SEO audit for SEO content?
Yes. The tool is built for search-focused workflows and pairs best with human review before publishing.
Does this audit crawl every country version?
No. It checks the rendered HTML you paste from one page. It cannot verify reciprocal return links, redirects, response status, or Google's selected canonical; use a crawl or Search Console after fixing the markup.
Do international pages need hreflang tags?
They are useful when substantially similar pages target different languages or regions. They do not replace translated content, local relevance, correct canonicals, or pages that return 200 and can be indexed.
Should every localized page have a self-referencing canonical?
Usually yes. Point each locale at its own final URL, then use hreflang to describe the alternate set. Canonicalizing every locale to the English page can remove the other locales from consideration.
Related free tools
Paste a page's HTML and check its canonical link without sending the source to a server. Find missing, duplicate, relative, or conflicting canonical URLs before they confuse search engines.
Turn any title into a clean, lowercase, hyphenated URL slug, stop words stripped, length checked, ready to paste into WordPress, Webflow, or whatever runs your site.
Generate a robots.txt file with crawl rules, sitemap location, and optional blocked paths.
Related articles
Finding the best open source seo tools lets you run technical audits, track keyword positions, and inspect backlinks without paying $200 per month for closed SaaS platforms. Self-hosted SEO software gives you full ownership of your crawl data, eliminates seat licenses, and avoids strict export quotas. By hosting tools on a local machine or a $5 VPS, engineering and marketing teams run deep scans directly against their own databases.
Short answer: Technical SEO makes a page reachable, crawlable, and understandable to search engines. On-page SEO makes the page the best answer for a searcher. Fix technical blockers first, then improve the page’s intent match, structure, and evidence. Doing more of one cannot compensate for a failure in the other.
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