If your website serves content in multiple languages or targets different geographical regions, managing search indexation is a major challenge. Without proper guidance, search engines like Google will struggle to display the correct language or country-specific version of a page to your visitors.
This leads to high bounce rates, duplicate content issues, and missed organic traffic.
The solution is the Hreflang Attribute—a markup tag that coordinates multilingual page variants.
To help you build valid, reciprocal hreflang sets, FluxToolkit provides a free, client-side Hreflang Tag Generator.
Hreflang Tag Generator
Build valid hreflang alternate tags for multilingual and multi-regional websites. Choose from 50+ BCP 47 locale codes, get HTML and XML sitemap output — all client-side.
What are Hreflang Tags?
Introduced by Google in 2011, hreflang is an HTML attribute used to identify the language and geographical target of a webpage. A set of hreflang tags tells search crawlers about all the available page variants:
<link rel="alternate" hreflang="en" href="https://example.com/page" />
<link rel="alternate" hreflang="es" href="https://example.com/es/page" />
<link rel="alternate" hreflang="x-default" href="https://example.com/page" />
The x-default Fallback Value
The x-default tag is a crucial component of any hreflang implementation. It tells search engines which page to serve as the fallback when the user's browser language or IP address location does not match any of the language-specific tags you have specified.
BCP 47 Locale Code Formatting Rules
Hreflang values must adhere to the BCP 47 standard. A BCP 47 code is composed of:
- Language Code: A mandatory two-letter ISO 639-1 code (e.g.,
enfor English,esfor Spanish). - Region Code: An optional two-letter ISO 3166-1 alpha-2 code (e.g.,
USfor United States,GBfor Great Britain).
Common mistakes that invalidate hreflang implementations:
- Incorrect Separator: Using an underscore instead of a hyphen (e.g.,
en_USinstead ofen-US). - Invalid Language Codes: Specifying language names (e.g.,
english) instead of ISO codes. - Wrong Order: Putting the country code before the language code (e.g.,
US-eninstead ofen-US).
Two Methods to Implement Hreflang Tags
Method 1: HTML Head Tags
Add the <link rel="alternate"> tags inside the <head> element of every page in the group. Every page must contain the entire set of links, including a link to itself (self-referential) and the fallback page (x-default).
Method 2: XML Sitemap Markup
Alternatively, you can declare language variants inside your XML sitemap. This keeps your HTML files clean and centralizes international targeting details:
<url>
<loc>https://example.com/page</loc>
<xhtml:link rel="alternate" hreflang="en" href="https://example.com/page" />
<xhtml:link rel="alternate" hreflang="es" href="https://example.com/es/page" />
<xhtml:link rel="alternate" hreflang="x-default" href="https://example.com/page" />
</url>
Step-by-Step: How to Generate and Verify Hreflang Tags
Follow these steps to generate compliant hreflang configurations:
Step 1: Input Your Base URL
Type your default page's absolute URL (e.g., https://example.com/page).
Step 2: Add Language/Region Variants
For each variant:
- Input the corresponding URL.
- Select the BCP 47 locale from the dropdown menu (e.g., es-ES for Spanish/Spain, fr-CA for French/Canada).
Step 3: Choose Your x-default Fallback Page
Select which URL serves as the fallback target for users speaking unspecified languages.
Step 4: Copy and Deploy the Outputs
Copy either the HTML <head> tags or the XML sitemap snippet from the output panels and integrate them into your platform.
Step 5: Verify Reciprocal Linking
Ensure that if Page A links to Page B via hreflang, Page B must link back to Page A. If this reciprocal connection is broken on even a single page, Google will ignore the entire hreflang group.
Frequently Asked Questions
Does Bing support hreflang tags?
While Bing has announced partial support for hreflang tags in recent years, it traditionally relies on the content-language HTTP response header or the <meta http-equiv="content-language"> meta tag in your HTML header to identify language targeting. It is best practice to implement both for full coverage.
What is the difference between language-only and region-specific targeting?
Language-only targeting (e.g., hreflang="es") serves the page to all Spanish speakers globally, regardless of location. Region-specific targeting (e.g., hreflang="es-MX") targets Spanish speakers located specifically in Mexico. Use region-specific tags only when you have localized currency, pricing, or regional content.
Can I use hreflang tags across different domains?
Yes. Hreflang links can point across subfolders (example.com/es/), subdomains (es.example.com), or entirely different domains (example.es). The same reciprocal linking requirements apply.
Where can I check if my hreflang tags contain errors?
You can monitor international indexation issues in the Google Search Console's "International Targeting" report or use online crawler audits to check for missing reciprocal tags.
Is my URL data sent to a server when using this generator?
No. The Hreflang Tag Generator runs entirely on the client-side. The locale mapping, tag formatting, and XML generation are computed inside your browser, ensuring complete privacy.
Related Articles
- SERP Preview Tool Guide — Preview how your multilingual page listings look in search results.
- Schema Markup Generator Guide — Generate structured schema markup for localized pages.
- Canonical Tag Generator Guide — Coordinate canonical links with your hreflang configuration.