Record your screen online

How to record your screen

1. Decide whether you want your microphone and the computer’s own audio, then press Start recording.
2. Your browser — not this page — shows a picker listing your screens, open windows and tabs. Choose one. This is a security boundary the page cannot reach around: only you can decide what is shared.
3. Switch to whatever you are recording. This tab keeps capturing in the background, and the length and file size counters keep running.
4. Press Stop and save here, or the browser’s own "Stop sharing" bar. Preview the result, download it, and optionally convert it to MP4.

Where the video actually goes

Frames come out of the browser’s capture API, into the MediaRecorder API, and into memory in this tab. They are turned into a file when you press stop, and that file goes to your downloads folder. That is the entire path. There is no upload step, no processing server and no storage bucket, and this site’s content security policy lists no third-party origin that a request could even be sent to.

This is the tool where that distinction matters most. A screen recording contains whatever was on your screen: an email client, a bank tab, an internal dashboard, a customer’s data, a password manager you forgot was open. Every "free online screen recorder" that streams to a server has all of that on their hardware, whatever their privacy page says. If you want to check this one, open your developer tools’ Network panel and record for a minute — nothing leaves. Or disconnect your network entirely; the page keeps working.

Audio capture, honestly

When both a microphone and a system source are available, the two are mixed into one track through the Web Audio API before recording, so the result is a single file with commentary over the audio from your screen. The on-page preview stays muted deliberately — playing your own system audio back through the speakers would create a feedback loop.

No watermark, no time limit, no account

The free tiers of the well-known screen recorders cap recordings at five minutes, stamp a logo into the corner, limit you to 720p, or require an account before the download button works. None of that applies here, because none of it is protecting a server bill. The real limit is memory: the recording is held in the tab until you save it, so at the balanced quality preset budget roughly 30 MB per minute and save in parts for very long sessions.

WebM, MP4, and the missing duration

Browsers record WebM natively. It is a perfectly good file — but MediaRecorder does not write the duration into its header, so many players show no timeline and refuse to scrub. Recent Chrome versions can record H.264 in MP4 directly, and when that is available the option appears in the setup panel. Otherwise, the convert button re-encodes the WebM to MP4 with FFmpeg on this same page, which fixes the header at the same time. If your editor accepts WebM, you can skip that step entirely.

Troubleshooting

• Nothing happens when you press start. The picker was dismissed or screen capture is blocked. On macOS, allow your browser under System Settings → Privacy & Security → Screen Recording, then restart the browser.
• The recording is silent. The audio checkbox in the picker was not ticked, or your browser cannot capture system audio at all — see the table above.
• The recording stopped early. Closing the shared window or tab ends the capture. Whatever was captured before that point is kept.
• The file is huge. Choose the small quality preset, which is usually indistinguishable for a screen recording since most of the frame is static.

Afterwards

Recordings often need a second pass: trim the dead air at the start, crop to the region that matters, compress to fit an upload limit, or extract the audio for a transcript. All of those run in the browser too, so the recording never has to leave the machine at any stage.