相机和音频
网络摄像头权限检查器
检查此浏览器是否可以访问摄像头，并查看授予、拒绝或丢失权限的行为方式。
隐私: 仅当您单击按钮时才请求访问相机。没有图像数据离开页面。
界面标签和工具名称已翻译。此页面上的详细指南和常见问题解答目前以英文编写。
测试接口
按“开始”后，您的浏览器可能会请求许可。如何使用这个工具
- Click Check camera permission and respond to the browser prompt.
- Read the result: granted, denied, no camera found, or unsupported.
- If denied, use the browser site settings to change the permission.
- Click Stop camera to release the device.
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技术说明
The page calls getUserMedia({video:true}) to trigger the normal permission flow. A successful stream confirms both permission and a usable video track; a rejected promise exposes the browser error name.
Permission state can change outside the page. The Permissions API may expose a camera state in some browsers, but getUserMedia remains the authoritative check for actual access.
故障排除
No prompt appears
If access is already blocked, the browser may reject immediately. Reset the camera permission for this site.
Permission is granted but no image
Another application may be using the camera. Close it and retry.
Camera not listed
Check the device connection and operating-system privacy settings.
Insecure context warning
Camera access normally requires HTTPS or localhost.
相关工具
常见问题
No. It is requested only after you press the check button.
No. The browser controls permission and will reject the request until you change it.
No. The check uses a live stream and does not capture or store an image.
Permission decisions are controlled by the browser per site and may persist until changed.
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