Screen Recorder

A screen recorder that does not phone home

Pick a tab, window, or your whole display, optionally talk over it, and download the result — no installer, no extension, no sign-up. The reason to record here rather than with a cloud service is what tends to be on screen during a capture: an internal dashboard, a half-logged-in account, a bug reproduced against real data. Since MediaRecorder assembles the video inside this tab, that footage is yours to review before anyone else could ever see it.

How browser screen recording works

The tool uses the Screen Capture API (getDisplayMedia) to obtain a live video stream of the tab, window, or screen you choose. That stream is fed into the MediaRecorder API, which encodes it into WebM chunks as you record and joins them into a single file when you stop. If you enable the microphone, a second audio stream is merged in, so narration and screen video end up in one file. What you download is built from that local data directly, with no point in the pipeline where the footage crosses the network.

Picking the right source

• A browser tab is the cleanest choice for web demos — only that tab is captured, and its audio can be shared too.
• An application window records a single app without exposing the rest of your desktop.
• Your entire screen is best for multi-app workflows, but remember it captures notifications and anything else on screen.

Audio: system sound and microphone

There are two independent audio sources. The picker's "Share audio" checkbox captures sound coming from the tab or system (useful for videos or app audio). The "Include microphone" toggle on this page adds your own voice for narration. Enable either, both, or neither depending on whether you are demoing, talking over a walkthrough, or want a silent capture.

A word of caution before you hit record

Because the file is genuinely private, the failure mode is not leakage to us — it is what you capture by accident. A full-screen recording will faithfully include any notification that pops up, an open password manager, a browser autofilling a card number, or a Slack DM in the corner. Recording a single tab or one application window is the safest habit: it frames only what you mean to show and keeps credentials and side conversations out of the file entirely.

WebM output and converting to MP4

The browser's encoder writes WebM, which YouTube, most editors, and messaging apps already accept. Only convert if a specific tool refuses it: rewrapping to MP4 with FFmpeg or HandBrake takes seconds and leaves every pixel intact, because it is a container change rather than a fresh encode.

Desktop only — and why

The Screen Capture API is implemented only in desktop browsers, so this tool needs a laptop or desktop running Chrome, Edge, Firefox, or Safari. On mobile, the operating system's own screen recorder (iOS Control Center, Android Quick Settings) is the right tool instead.

Related media tools

• Video Thumbnail — pull a clean cover frame out of the screencast you just recorded.
• Video Mute — drop the audio if a capture picked up sound you did not want shared.
• Audio Recorder — record polished narration on its own to layer over the demo.