Screen Recorder

Record video from the computer's screen

Record Your Screen Directly in the Browser

This screen recorder captures your entire display, a single application window, or a browser tab and saves the result as a video file on your device. It runs entirely in the browser. No data leaves your machine, no software installation is required, and recordings start in seconds. You choose a MIME type, click Start Recording, grant the browser permission to capture, and click Stop when you are finished. The file downloads automatically.

How the Screen Recorder Works Under the Hood

Modern browsers expose two APIs that make client-side screen recording possible: getDisplayMedia and MediaRecorder.

When you click Start Recording, the tool calls navigator.mediaDevices.getDisplayMedia(). The browser then shows its native picker, letting you select a monitor, window, or tab to share. The API returns a MediaStream that contains a video track and, if the browser and source support it, an audio track for system sound.

That stream is fed into a MediaRecorder instance, which encodes the frames in real time using the codec you selected. As data becomes available, the recorder collects it in memory. When you stop, the tool assembles the chunks into a single Blob, generates a download URL, and saves the file to your device.

If you enable microphone recording, the tool also requests a getUserMedia audio stream with noise suppression and echo cancellation enabled, then merges it with the desktop audio before encoding.

Supported Codecs and Browser Compatibility

The tool probes the browser at load time with MediaRecorder.isTypeSupported() and shows only the formats your browser can actually encode. The candidate list includes:

Safari has limited MediaRecorder support. If you see no format options, your browser does not support the API. Switching to Chrome or Edge resolves this.

Recording Quality: Resolution, Frame Rate, and File Size

The recorder captures at the native resolution of the source you share. If you share a 4K monitor, you get a 4K video. If you share a single browser tab at 1280x720, the output is 720p. This means the simplest way to control resolution is to resize the window or tab before recording.

Frame rate depends on your hardware and the browser's compositor. Most desktop browsers capture at 30 fps by default, which is sufficient for tutorials and presentations. Fast-moving content like games may benefit from a Chromium flag (--enable-features=DesktopCapture60Fps), but that sits outside this tool's scope.

File size scales linearly with duration and resolution. A 10-minute 1080p recording in VP9 typically produces 50–150 MB depending on scene complexity. VP8 files tend to be larger for the same quality. H.264 falls between the two and offers the widest playback compatibility. If you plan to share the video and file size matters, prefer VP9 or H.264 over VP8.

Practical Tips for Common Scenarios

Tutorial recording. Share a single application window rather than the full screen. This keeps the video focused and avoids exposing notifications or personal information from other windows. Use a microphone with noise suppression for voiceover, and pause briefly before each step so viewers can follow.

Bug reporting. Record the browser tab where the bug occurs and keep the DevTools console visible. A 30-second clip showing the reproduction steps saves more back-and-forth than a paragraph of text. Save in WebM/VP8 for maximum browser playback compatibility when attaching to issue trackers.

Presentation capture. Open your slides in a separate window and share that window. This lets you keep speaker notes on your main screen without recording them. Choose H.264/MP4 if the recording needs to play natively on phones or in video editors that do not handle WebM.

Frequently Asked Questions

What file formats can I save my recording in?

The available formats depend on your browser. Chrome and Edge typically support WebM (VP8, VP9) and MP4 (H.264). Firefox supports WebM with VP8. The tool detects supported formats automatically.

Can I record system audio?

Yes, if the browser's getDisplayMedia prompt includes an audio option. Chrome shows a "Share audio" checkbox when you select a tab. Full-screen and window captures may not include system audio depending on the operating system.

Is there a recording time limit?

The tool imposes no limit. Recording duration is bounded by available browser memory, since chunks accumulate in RAM until you stop. For very long sessions (over 60 minutes), close unnecessary tabs to free memory.

Does this tool store my recordings?

No. The entire process runs in your browser. Video data stays in local memory and is discarded after the file downloads. Nothing is uploaded to a server.

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