A developer-first i18n and locale inspector. Inspect navigator.language, timezone, text direction, hreflang tags, and locale-sensitive formatting without opening DevTools.
Display navigator.language and navigator.languages instantly. Know exactly what locale the browser reports to the page.
FREEDetect the user's timezone via Intl.DateTimeFormat, show UTC offset, and display local time with the current locale.
FREEShow whether the page renders LTR or RTL. Check html dir attribute, body dir, and computed direction at a glance.
FREESee the html lang attribute, Content-Language header, meta content-language, and charset. Essential for accessibility and SEO.
FREECapture the Content-Language response header from the server. Know what language the server thinks it's serving.
FREEOne-click copy of all locale information to clipboard. Share with your team or paste into bug reports.
FREETest how your app behaves with different browser locales. Override navigator.language without changing browser settings.
PROCompare date, number, and currency formatting across 15 locales. See Intl.DateTimeFormat, NumberFormat, and more side by side.
PROAnalyze hreflang link tags for multilingual SEO. Detect missing x-default, duplicate locales, relative URLs, and more.
PROSee how text renders with locale-specific fonts for CJK, Arabic, Devanagari, Thai, and more. Verify font fallbacks.
PROExport a complete i18n audit as structured JSON. Locale info, formatting samples, hreflang analysis -- all in one file.
PROOverride the Accept-Language HTTP header to test server-side locale negotiation. See how servers respond to different language preferences.
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