Record your screen without an upload

A screencast for a colleague or a bug video — captured and saved in the browser, no account and no cloud.

Tools used in this guide

The job

Show, don't tell: a 20-second clip of the broken flow beats three paragraphs of a bug report. getDisplayMedia captures the screen inside the browser — the file never touches a server.

Record it

Toggle mic audio on if you want narration, press start, and pick the screen, window, or tab in the browser's share dialog. Stop to get a take; download it or play it back. Each take can run up to 10 minutes.

Window mode crops to one app — safest for screen sharing.
Tab audio capture depends on the share dialog's 'also share audio' checkbox.

Worked example

Recording a flaky hover menu: mic off, share just the browser window, 15 seconds of hovering while it stutters. The WebM file downloads straight to disk and attaches to the ticket — the reviewer sees the actual stutter.

Limits

Container format is the browser's choice — Chromium writes WebM (VP9/VP8), Safari usually MP4; players need the matching codec. 10 minutes per take. Desktop capture needs the share permission every take — that is the security model, not a bug.