Language and region codes
Inspect the signal in the rendered page.
SEO tool · Free in Chrome
Hreflang Checker for Return Tags and International SEO
Search Toolbox helps you verify every localized URL and its reciprocal return links, directly on the live page. The goal is a reciprocal language cluster with valid, indexable and canonical destinations, without hiding the evidence behind one overall score.
international SEOs, ecommerce teams and migration owners
What you can verify
Reciprocal return tags
Compare source code with the browser output.
x-default coverage
Find contradictions that block indexation.
HTTP and canonical consistency
Export evidence your team can act on.
The observable problem
One broken return tag or non-canonical locale can invalidate the logic of an otherwise clean cluster.
The useful outcome
a reciprocal language cluster with valid, indexable and canonical destinations
Evidence on the real page
hreflang checker
A verifiable workflow, not a decorative score
Open the real page
Check the hreflang checker in the real session, staging environment or localhost — preferably the troublesome page, not the perfectly groomed demo.
Inspect the evidence
Check language and region codes, reciprocal return tags, x-default coverage, http and canonical consistency and connect signals that contradict each other.
Fix and retest
Aim for a reciprocal language cluster with valid, indexable and canonical destinations. Change one rule at a time, then repeat the exact same check so you know what actually moved.
What this page does not pretend to do
For the hreflang checker, Search Toolbox inspects the active URL deeply. It is not a full-site crawler, backlink platform or rank tracker. Test several URLs when the issue comes from a template.
Frequently asked questions
What does the hreflang checker check?
It covers language and region codes, reciprocal return tags, x-default coverage, http and canonical consistency to deliver a reciprocal language cluster with valid, indexable and canonical destinations.
Is the hreflang checker free?
Manual checks for the hreflang checker are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.
Does it work on staging and localhost?
Yes. The hreflang checker check runs on the page you are viewing, including logged-in sessions and non-public environments.
Is it a full SEO crawler?
For the hreflang checker, Search Toolbox inspects the active URL deeply. It is not a full-site crawler, backlink platform or rank tracker. Test several URLs when the issue comes from a template.
Verify it on your own page.
Manual checks for the hreflang checker are included in the 60+ free tools. Only the optional contextual SEO Expert uses credits.