Browser Language Detector

See every language your browser sends in the Accept-Language header, with locale details.

Embed this tool on your site

<iframe src="https://abracalc.com/device/browser-language/embed.html" width="360" height="340" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Open this page — it runs instantly in your browser, no signup or install.
Allow any permission prompt if asked; everything stays on your device.
Use the on-screen controls — results update live.

See every language your browser sends in the Accept-Language header, with locale details.

Frequently asked questions

What is Accept-Language?: It is an HTTP request header your browser sends to servers listing your preferred languages in order, e.g. en-US,en;q=0.9,fr;q=0.8.
Can I change my browser language?: Yes — in Chrome go to Settings → Languages. In Firefox go to Settings → General → Language. Changes take effect on the next request.