Device Information Checker Online - Browser, Screen and Time Zone
View browser-exposed user agent, language, platform, screen, connectivity and time-zone information locally.
About this tool
The page reads standard browser properties and formats them as JSON. It reports what the browser exposes, not a verified hardware identity.
How to use
- Enter the value in the format described by the tool.
- Run the conversion or calculation in your browser.
- Review and copy the generated result.
Features
- Browser and language details.
- Screen size and pixel ratio.
- Online, cookie and time-zone status.
Common use cases
- Diagnose responsive layout reports.
- Copy environment details for support.
- Check the active browser locale and time zone.
Common issues and tips
- Privacy protections can reduce or generalize reported values.
- Platform and online status do not prove hardware model or internet reachability.
Privacy
Processing runs locally in your browser. Input is not uploaded to Tools12345.
Frequently asked questions
Does it identify my exact device?
No, it only displays browser-exposed properties.
Is the information uploaded?
No.
Why can user agent be inaccurate?
Browsers may freeze or reduce it for compatibility and privacy.