Hreflang Checker Tools Compared

Finding hreflang errors before Google does requires the right tooling. The landscape splits into two categories: generation tools (help you build the tags) and validation tools (help you check existing tags). Some tools do both.

Here's how the main options stack up.

Hreflang Generator

This is our tool. It handles the full workflow -- you input your URLs and language/region combinations, it generates correctly formatted hreflang tags (HTML <link> tags or XML sitemap format), and then validates the output before you deploy.

The validator checks for the mistakes that actually break hreflang: missing return links, invalid language codes, canonical conflicts, relative URLs, and non-200 targets. You can paste in existing markup to audit what's already live, or validate freshly generated tags.

Good for: anyone who needs to build and check hreflang without switching between multiple tools.

Aleyda's Hreflang Generator

Aleyda Solis's hreflang generator (hreflang.pro) has been the go-to free generation tool for years. You enter your page sets, pick language/region codes from dropdowns, and get the correct markup output.

It's a generation-only tool -- it won't validate existing tags on your site or crawl pages to find errors. But for quickly building the markup for a small set of pages, it's fast and reliable.

Good for: generating tags for a handful of pages when you already know what you need.

Screaming Frog

Screaming Frog is the industry-standard technical SEO crawler. Its hreflang reports are thorough: it crawls your site, extracts all hreflang tags, and flags issues including non-reciprocal links, invalid language codes, and mismatched URLs.

The free version limits you to 500 URLs. For large sites you need the paid license ($259/year). It's not purpose-built for hreflang -- it's a general crawler that happens to have solid hreflang support -- so the workflow is more involved than a dedicated validator.

Good for: technical SEO audits where hreflang is one piece of a larger crawl.

Ahrefs Site Audit

Ahrefs includes hreflang validation in its Site Audit tool. It checks for issues like missing return links and invalid hreflang values and surfaces them in the audit report. You're paying for a full SEO platform though -- if you only need hreflang validation, the price-to-value ratio is low.

Good for: teams who are already on Ahrefs and want hreflang errors folded into their existing audit workflow.

Semrush Site Audit

Semrush's Site Audit tool checks hreflang implementation alongside its broader technical audit. Similar story to Ahrefs -- the hreflang checking is capable but you're buying a full suite. Semrush tends to have better hreflang error reporting than Ahrefs, with clearer error categorization.

Good for: Semrush subscribers who want hreflang coverage without adding another tool.

SISTRIX

SISTRIX is a German SEO platform with strong coverage of European markets. Its site audit includes hreflang checking, and it's particularly useful for multilingual European sites where you're targeting multiple country/language combinations across de, fr, es, it, and similar codes.

Good for: European SEO focused teams. Less useful if your primary markets are US/UK/AU English variants.

Chrome extensions

There are a handful of Chrome extensions (like hreflang Tag Checker) that show you the hreflang tags present on any page you visit. They're useful for quick spot-checks -- visit a page, open the extension, see what hreflang tags are present and whether there are obvious issues.

They can't do bulk validation, can't check return links across pages, and can't catch the errors that only emerge when you look at the full cluster. Treat them as a quick sanity check, not a validation tool.

Good for: spot-checking specific pages during development or after deployment.

Which tool to use

If you're building hreflang from scratch: use Hreflang Generator to build and validate in one workflow.

If you're auditing an existing large site: Screaming Frog gives you the most control and detail, but requires time investment to set up and interpret.

If you're already paying for Ahrefs or Semrush: use their built-in audit tools to cover hreflang without adding another subscription.

If you just need a quick spot-check on a single page: a Chrome extension or Aleyda's tool gets you there fast.

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