SCREEN RECORDER
Screen recorder, record in the browser.
Use the browser’s built-in capture to record the whole screen, a window or a tab, optionally with mic or system audio, then preview and download as WebM. No software, fully local.
Tip: the first recording shows a system picker — allow it. Chrome / Edge / Firefox supported; Safari limited.
How do I use the screen recorder?
Click Start, pick the screen/window/tab in the dialog and share. The tool records with a timer. Choose Microphone to narrate. When done, click Stop, preview and download as WebM. The file never leaves your computer.
示例与注意事项Example & notes
一个例子A worked example
选「整个屏幕」或「某个标签页」，点开始录制，结束后自动下载 WebM 视频。Choose a whole screen or a single tab, press record, and the WebM file downloads when you stop.
注意事项Things to watch
- 浏览器只允许通过授权弹窗选择录制来源，未授权就无法开始。Recording sources can only be picked through the browser permission dialog; without it nothing starts.
- 需要声音时要在弹窗里同时勾选麦克风或系统音频，否则默认无声。Tick microphone or system audio in the dialog or the recording stays silent.
- 长时间录制会占用大量内存，建议 30 分钟以内并分段落盘。Long recordings eat memory — keep sessions under about 30 minutes.
相关问答More Q&A
视频会上传吗？Is the video uploaded?
不会，录制与合成都发生在浏览器本地。No — recording and encoding happen locally in the browser.
能直接导出 MP4 吗？Can it export MP4 directly?
浏览器原生支持 WebM，需要 MP4 可用站内视频工具再转一次。Browsers record WebM natively; convert with the video tool here if you need MP4.