How to use Language & timezone inspector
Inspect browser languages, timezone, calendar and number-format settings with local formatting examples. The check runs when you submit the form. Its inputs are processed in this browser.
How the check works
The check reads navigator.languages and the resolved options of the internationalisation APIs. It formats a fixed reference instant and number for comparison.
The Overview tab explains the findings. Measured data lets you search individual fields and values, while JSON report shows the complete export. Export JSON to retain a baseline, or print the findings for your own records. Review the report before sharing it: browser characteristics, token claims, and file names can reveal information about your setup.
Read the result in context
Locale settings explain differences in date ordering, decimal separators and calendars. The timezone is the browser’s reported setting, not a verified location.
Understand the limits
Extensions, operating-system preferences and privacy settings can alter these values. Language does not establish nationality or identity.
Common questions
Where is the input processed?
In this browser tab. This tool does not submit its input to the site server or a third-party service.
What should I keep with a result?
Record the selected options, browser and time. Review exported values before sharing them. Generated passwords, tokens and HMAC secret keys are excluded from report exports.