Why is the recording's length missing or wrong when I play it?

A WebM written live has no length in its header, because the browser cannot know it until it stops. The player here works around that; a player elsewhere may show a dash until the file is scanned or converted. Sending it through the Video Converter writes a proper header.

Can I record a window and my webcam together?

Not on this page. Record the screen here, and put a webcam clip over it on the Video Editor, which lays one video on another.

Screen Recorder

Record your screen, a window or a browser tab, with the sound and your microphone if you want them. Nothing leaves your computer.

Ready

0:00

Press Start recording

The browser asks which screen, window or tab to capture. Stop from here or from the browser's own sharing bar; the file appears below either way.

About this tool

Records your screen, one window or one browser tab to a video file, with the screen's own sound and your microphone if you want them, using the capture the browser has built in. Press Start, choose what to share when the browser asks, and press Stop when you are done; the file appears on the page to play, save, or send on to the converter, the trimmer or the video editor. Nothing is installed and nothing is uploaded: the recording is written on your computer and stays there.

How to use it

1Decide whether to record the screen's sound and whether to add your microphone.
2Press Start recording and pick a screen, a window or a tab in the browser's dialog.
3Pause if you need to, then press Stop here or in the browser's sharing bar. Play it back, download it, or send it to another tool.

Good to know

The file is what the browser writes

Chrome, Edge and Firefox record to WebM; Safari records to MP4. The recorder does not transcode, which is why it is instant, and the Video Converter is one click away for an MP4, the Trimmer for cutting the start and end, and the Video Editor for anything more. The file is read into memory by your own browser and processed there, so it is never uploaded and never reaches a server.

Sound, and where it comes from

The screen's own sound is offered by the browser when you share a tab, and on Windows when you share the whole screen; a shared window is usually silent. Your microphone is mixed underneath into one track, so a narration and a video's audio both make it into the file. The level bar shows which microphone is live.

Length and memory

The take is kept in memory a second at a time, so a crash costs a second rather than the recording. An hour of a busy screen is a few hundred megabytes; the recorder stops at an hour, and a phone browser does not offer screen capture at all.