网页在线设备模拟器
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.
Enter a URL and click Load Preview
Preview loads via iframe; sites with X-Frame-Options may refuse. All local.
How to Use
- Paste any valid JSON, supports nesting, arrays and escapes
- Click Beautify to auto indent and format
- Click Minify to remove whitespace into one line
- All operations run locally for privacy
Related Tools
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.