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- "Init history"v9.5.69/22/2026
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Chrome Extension: i18n & SEO Scanner
Overview
Intlayer i18n Scanner is the official Chrome extension for Intlayer. Open it on any website to see how the site handles internationalization: which framework and i18n library it uses, which locales it exposes, and whether its multilingual SEO tags are set up correctly.
It works on every website, whether or not it uses Intlayer.
Extension link: https://chromewebstore.google.com/detail/intlayeri18nscanner/pmlehcgmjmfimmjnembihbakhnheiabc
Features
- Technology detection: identifies the framework (Next.js, Nuxt, Astro, SvelteKit, Angular, Vue.js, Qwik, React, Gatsby, WordPress) and the i18n library (Intlayer, i18next, Vue I18n, @nuxtjs/i18n, Angular @angular/localize, next-intl / next-i18next, Weglot, Localize, WPML, Polylang). Each detection shows the evidence that triggered it, such as a global variable, a cookie or a DOM marker.
- Locales: lists the locales found in the
langattribute, hreflang andog:localetags, the URL locale prefix, and locale cookies or storage entries. - SEO i18n tags: checks
html lang,html dir, the canonical link, hreflang tags,x-default,og:localeand the ratio of localized internal links. - Full audit: runs the same audit as the i18n SEO Scanner and shows a live score.
Installation
Install Intlayer i18n Scanner from the Chrome Web Store, then pin it to your toolbar.
The extension works in Chrome and in any Chromium based browser that supports Chrome Web Store extensions (Edge, Brave, Arc, Opera).
Usage
Inspect a page
- Open the website you want to inspect.
- Click the Intlayer i18n Scanner icon in the toolbar.
- The popup shows the Detected technologies, Locales and SEO i18n tags sections for the current page.
Detection runs locally in your browser, on the current tab only.
Run a full audit
Scroll to the Full audit section and click Run full i18n audit. Results stream in as each check completes, grouped into:
- Page:
html langanddirattributes, current locale, hreflang tags,x-default, canonical link, localized internal links, language selector, flag icons, and unused locale content shipped in the JavaScript bundle. - Robots.txt: presence, and whether locale paths stay crawlable.
- Sitemap: presence, every locale listed, alternate links and
x-default. - Domain: number of locales discovered across the site.
Each check is marked as passed, warning or failed, and the score summarizes the overall i18n SEO health of the page.
Privacy and permissions
The extension requests minimal permissions:
- activeTab and scripting: the detector runs only on the tab you are viewing, and only when you open the popup.
- back.intlayer.org: used only when you run a full audit. The URL of the current page is sent to the Intlayer API to be scanned.
No browsing history is collected and nothing runs in the background.
FAQ
No. The extension inspects any website, whatever framework or i18n library it uses.
Detection relies on what the page exposes in the browser: global variables, cookies, meta tags and DOM markers. Some production builds strip these markers, so a library can be in use without leaving a visible trace.
Most checks map to a routing or metadata setting. With Intlayer, hreflang, canonical, x-default, localized links, sitemap and robots.txt are generated from your configuration. See the integration guide for your framework, for example Next.js, Nuxt or TanStack Start.