Developer Tools
ViewPortal - Responsive Tester
ViewPortal 用移动设备浏览器内核按不同视口宽度显示网站，便于并排检查响应式布局。
适合随手检查断点的开发者
可切换预设、横竖屏、缩放，并在 iPad 横屏并排查看多种尺寸。
Keep in mind: 视口模拟不等于运行各设备原生系统或不同浏览器内核；localhost 指当前设备，桌面开发服须使用可达局域网地址。
Inside the app
Official product images
What you can do
- 设备尺寸与方向预设
- 多视口并排及像素读数
- 网址、收藏和开发站点预览
Good for
- 需要初查网页布局的设计开发人员
Consider alternatives for
- 需要代替真实设备、性能或跨内核测试的人
Limitations & considerations
- Captured minimum: iOS 16.4.
- 视口模拟不等于运行各设备原生系统或不同浏览器内核；localhost 指当前设备，桌面开发服须使用可达局域网地址。
Privacy & permissions
收藏和偏好按描述本地保存，但打开网址必然请求目标网站；测试私有网址需控制网络和登录信息。
Sources & review notes Updated Nov 15, 2026
Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.
- US App Store developer description
Complete description, release notes, download price and compatibility metadata captured 2026-11-02.
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