Responsive Device Simulator
网页在线站长工具免费工具本地处理
Device previewer rendering any URL in a resizable iframe to check responsive layouts at various resolutions.
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How to Use
- Environment info is collected the moment you open the page
- Inspect screen, OS and browser details
- Handy reference while debugging responsive issues
- All checks and generation run locally — nothing is uploaded
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FAQ
Is any data uploaded?
No, all processing happens locally; nothing you type or upload ever reaches a server.
Are results accurate?
Standard public formulas and parameters are used; defer to official sources for policy rates.
Which browsers are supported?
Modern Chrome, Edge, Safari and Firefox; camera/mic features require permission grants.