Hreflang is an HTML attribute that tells search engines which language and regional variant of a page to show for a given user. It is the standard way to signal localized versions of the same content.

Where do I put hreflang tags?

You can place them in the HTML head, the HTTP Link response header, or an XML sitemap. The tool generates all three formats — pick the one that fits your stack.

x-default is a special hreflang value that points to the fallback page shown when none of the specified locales match the user. Typically it points to your English or locale-agnostic landing page.

Does hreflang need to be reciprocal?

Yes. If page A lists page B as an alternate, page B must list page A back. Missing reciprocity is the most common hreflang mistake and this tool catches it automatically.

Do I need to include a self-reference?

Yes. Each page must include itself in its hreflang set. The tool adds self-references automatically when you generate output.

What locale code format should I use?

Use ISO 639-1 for language (en, es, de) and optionally ISO 3166-1 alpha-2 for region (US, ES, DE). The full form is en-US, not en_US.

Can I use hreflang with different domains?

Yes. Each alternate URL can be on a different domain. The tool accepts any absolute HTTPS URLs.

Why does my sitemap need xhtml:link annotations?

The xhtml:link element inside a sitemap entry is the sitemap-format equivalent of the head link tag. Google prefers this format for large multilingual sites.

Is this tool open access?

Yes. Unlimited usage, no signup, no account, no paywall. Use it as often as you need.

What if I have 10,000 URLs?

Paste them as a CSV. The tool handles bulk input via a Web Worker so the UI stays responsive.

Hreflang Tag Generator — Premium Tool for International SEO

A quick orientation: this page covers what hreflang is, how to use the tool above, a worked example, the four mistakes that wreck most hreflang setups, and how this premium tool compares to the alternatives.

What is a hreflang tag generator?

A hreflang tag generator is a tool that produces the rel="alternate" hreflang="..." link annotations that international sites use to tell search engines which language and regional variant of a page to show for each user. It turns a list of localized URLs into copy-paste-ready <link> tags, an HTTP Link: header, an XML sitemap with xhtml:link annotations, or JSON-LD structured data — whichever format your stack needs.

Used correctly, hreflang is the strongest signal Google has that two pages are the same content in different languages. Used incorrectly, it's the single most common source of broken international rankings. This premium tool checks your input for the three mistakes that wreck most hreflang setups — non-reciprocal links, missing self-references, and mixed HTTPS/HTTP — before it hands you the output.

How to use this hreflang tag generator

Follow these five steps to build a valid hreflang set in under two minutes:

List each localized URL of your page. Paste the absolute HTTPS URL, the ISO 639-1 language code (like en, es, de), and an optional ISO 3166-1 alpha-2 region code (like US, GB, ES) for every variant. The built-in autocomplete validates both code lists as you type.
Add an x-default URL (recommended). This is the fallback page shown when none of your specified locales match the user's browser language. Most sites point it at their English or locale-agnostic landing page.
Watch the live validation panel. Errors block output generation (non-HTTPS URLs, malformed ISO codes, duplicate locales); warnings flag soft issues like inconsistent trailing slashes or a missing x-default. The panel tells you exactly which row to fix.
Pick your output format. HTML <link> tags go in your page <head>. The HTTP Link: header goes in your server config for non-HTML responses like PDFs. The XML sitemap format is Google's preferred format for large multilingual sites. JSON-LD is a debug/documentation format that can sit alongside structured data.
Copy or download. Each output tab has its own copy-to-clipboard button and a download button with a sensible filename (hreflang.html, sitemap.xml, etc.). Your data never leaves your browser — this tool runs entirely client-side.

Load an example

Click Load example in the input panel to populate the tool with a realistic three-locale e-commerce scenario (English US, Spanish Spain, German Germany) and see every output format filled out. The example is a good starting point for adapting to your own URL structure.

Deep dive: what makes a correct hreflang set

Most international SEO audits fail on three specific mistakes. This hreflang tag generator catches all three — but understanding them makes you faster at debugging broken setups you didn't build.

Reciprocity. If page A lists page B as an alternate, page B must list page A as an alternate in return. A one-way link is not a hreflang relationship; Google silently ignores it. Reciprocity is structural in this tool: every URL in your input set receives alternates referencing every other URL, so getting reciprocity wrong is impossible.

Self-reference. Every URL must include itself in its own hreflang set. A page saying "my Spanish version is over there" without also saying "I am the English version" is malformed. Again, this tool generates the self-reference automatically; you never have to write it.

Absolute HTTPS URLs. Relative URLs (/en/page) and HTTP URLs (http://example.com/en/page) both get silently dropped by search engines. Every URL must be absolute and use HTTPS. The tool rejects non-HTTPS input at generate time and flags protocol inconsistencies at validate time.

The fourth mistake — less common but harder to debug — is inconsistent trailing slashes. Google treats https://example.com/en/page and https://example.com/en/page/ as two different URLs, which means a hreflang set mixing both forms will only half-work. The validation panel flags trailing-slash inconsistency as a warning so you can pick one convention and stick with it.

Common errors and how to fix them

Here are the five mistakes this tool catches that auditors see most often in broken setups.

Mixing HTTP and HTTPS URLs. If any row uses http:// the tool refuses to generate output. Fix it by changing every URL to the HTTPS form that your site actually serves. If your site has a legitimate HTTP-to-HTTPS redirect, use the redirect target, not the source.
Using en_US instead of en-US. The hreflang spec uses a hyphen between language and region, not an underscore. The tool auto-normalizes language codes to lowercase and region codes to uppercase, and it rejects inputs that don't match the 2-letter ISO formats.
Listing the same locale twice. If two rows both declare en-US, Google can't decide which page is the canonical US English version, so it picks arbitrarily. The tool blocks generation on duplicate locales and tells you which rows collide.
Forgetting x-default. A missing x-default isn't a syntax error, but it reduces hreflang's effectiveness. Users whose Accept-Language header doesn't match any of your declared locales see whatever page the search result happens to list, which might not be your best landing page. The validation panel warns on a missing x-default when you have 2+ rows.
Claiming Chinese Traditional vs Simplified incorrectly. Chinese is especially tricky: zh-CN is Simplified (mainland China), zh-TW is Traditional (Taiwan), zh-HK is Traditional (Hong Kong). Serving Simplified content at zh-TW or vice versa is a soft quality signal Google notices over time. This tool validates the ISO codes but can't inspect your actual content — you still have to match content to code manually.

How this tool is different

Four things set this premium hreflang tag generator apart from the alternatives:

Live validation. Every keystroke is revalidated. You see errors as you type, not after hitting a "Generate" button and waiting.
Four output formats at once. HTML, HTTP header, XML sitemap, and JSON-LD are all generated from the same alternate set. Switch tabs to copy whichever one your stack needs — you don't have to pick upfront.
Bulk input support. Paste a 10,000-row CSV and the tool handles it off the main thread via a Web Worker. The UI never locks up while generating large output.
Shareable state URLs. Click the "Share link" button to generate a URL that encodes your current tool state. Send it to a colleague or save it to your tickets — they'll see the same input when they open the link.

Everything runs in your browser. There is no signup, no account, no paywall, no usage cap, no server that sees your URLs. The tool is a premium resource available to every international SEO professional.

Hreflang Tag Generator