Screen recorder — capture a screen, window or tab in the browser

How to use the screen recorder

1. Tick Add my microphone if you want to narrate. Leave Include tab/system audio when offered ticked to capture the sound of what you share.
2. Press Start recording. Your browser opens its sharing dialog.
3. Pick a whole screen, a window or a tab (the wording varies by browser), turn on audio sharing in the dialog if you want sound, and confirm. If you ticked the microphone, allow it when asked.
4. The timer runs while you record. Use Pause and Resume to leave out parts, and Stop when you are done.
5. Play the result on the page and press Download. The file is named like screen-2026-10-07-153005.webm.

What it does and when to use it

A screen recording is often the quickest way to explain something: how to fill in a form, where a bug appears in an app, the steps of a spreadsheet task, or a short demo of a website for a colleague. Recording a single tab keeps notifications and other windows out of the video. Because everything happens in the page, there is no extension or program to install.

To record yourself instead, use the webcam recorder. Afterwards, cut out mistakes with the video trimmer, shrink the file for email with the video compressor, or turn a short demo into a GIF with video to GIF.

How it works

The page asks the browser for a screen capture at 30 frames per second using the Screen Capture API. You always choose what is shared; the page cannot see anything until you confirm the dialog. If both the shared sound and your microphone are on, the Web Audio API mixes them into one track. The browser’s MediaRecorder then encodes the video, preferring WebM with VP9 or VP8 and Opus, or MP4 with H.264 and AAC where WebM is not available, and adds a piece of the file every second.

Worked examples

• A bug report: share one browser tab with tab audio on and the microphone ticked. The video shows only that tab, with its sound and your explanation.
• A software walkthrough: share the entire screen on Windows with system audio and microphone. Anything that pops up on screen will be in the video, so close private windows first.
• A silent slide demo: untick both audio options and share the presentation window. The file has no audio track.

Limits and tips

• The page must be on https and the browser must support screen capture.
• Long recordings use memory, because the file is held in the tab until you download it. Record long sessions in parts.
• If the microphone fails, the page shows an error but keeps recording the screen without it.
• Need MP4? Recordings are often WebM. Convert them with the video converter, which also makes them easier to skip through in some players.