Video & Audio
Screen Recorder
Record your screen, a window or a tab, with system audio and an optional microphone.
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A screencast explains in ninety seconds what takes twenty minutes to describe in writing: a bug that only appears when you click in the right order, a walkthrough for a colleague, a demo for a client. The recorder built into the operating system is often missing, buried, or locked to one platform.
This records whatever you choose to share — the whole screen, one window, or one browser tab — and can mix system audio together with your microphone, which is the combination you need when narrating over a video call or a video. You set the resolution, frame rate and bitrate, and the file is assembled in the tab with no server involved. Sharing stops the instant you press the browser's own Stop sharing button, and the recording follows it.
How to use it
- Press Share screen and pick what to capture. A single tab is usually sharpest and avoids capturing your own notifications.
- Tick System audio to include the sound playing on your machine, and Microphone to narrate over it. Both at once are mixed together into one track.
- Set the resolution and frame rate. 1920×1080 at 30 fps is right for a demo; drop to 1280×720 at 15 fps for a long recording of mostly static text.
- Choose the bitrate. 8 Mbps suits 1080p screen content; text and slides stay legible at 4 Mbps.
- Press Start recording. Use Pause during the boring parts — paused time is cut from the file.
- Press Stop, play it back, then Save. Keep the tab open while recording: closing it ends the capture.
Questions
Can it record sound from the computer as well as my voice?
Yes, where the browser allows it. Chrome and Edge on Windows can capture system audio from a tab or the whole screen; macOS and Linux generally cannot, because the operating system does not expose it to the browser. Tick the box and the share dialog will tell you whether audio is included — if it is, a small audio indicator appears in the picker.
Why does the recorded file look softer than my screen?
Screen recordings are video, so text is compressed. The fix is bitrate rather than resolution: 1080p at 4 Mbps looks soft, the same 1080p at 12 Mbps is crisp. Record one window rather than the whole screen too, and set your display scaling to 100% so each pixel is a pixel.
Is anything sent to a server?
No. The screen pixels go from the capture API into the recorder inside this tab and become a file in memory. There is no upload step, which is why it works with the network disconnected — and why you should not close the tab mid-recording.