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Hreflang Tester — Validate International SEO Tags Online

Test and validate hreflang tags for international SEO. Check for errors, missing tags, and proper implementation.

How this Hreflang Tester — Validate International SEO Tags Online works

The Hreflang Tester runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

  • No server interaction – data never leaves your device
  • Instant results since there is no network latency
  • Works offline once the page is loaded
  • Free to use with no usage limits

How to Use

1

Input

Enter or paste your content into the input field.

2

Action

Click the primary button to generate or format.

3

Result

Copy your result immediately from the output box.

Frequently Asked Questions

What does the hreflang Tester check?
It checks your hreflang setup for common issues like missing return links, invalid language/region codes, broken URLs, and inconsistent mappings between alternate pages.
What is a return link and why does it matter?
A return link means if Page A points to Page B as an alternate, Page B should also point back to Page A. Missing return links can weaken or break hreflang signals.
Can hreflang fix duplicate content problems?
hreflang helps search engines serve the right version by locale, but you should still use correct canonicals and keep versions consistent. hreflang is not a replacement for canonical tags.
What are the most common hreflang mistakes?
Common problems include wrong codes (like en-UK instead of en-GB), pointing to non-indexable pages, mixing canonicals to a different language page, and forgetting x-default when you have a global selector page.
Is this hreflang Tester safe to use?
Yes. It runs 100% client-side, so your checks run locally in your browser and are not uploaded to a server.

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The Hreflang Tester is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.