Is the video uploaded to a server?

No. getDisplayMedia hands the frames straight to MediaRecorder inside your tab and the result sits in memory as a blob. This site is static files on a CDN — there is no endpoint that could receive a video. The trade-off is that a reload throws the recording away, so download it before you close the tab.

How long can a recording be?

The tool sets no limit. Memory is the real ceiling: 1080p at the balanced preset runs about 30 MB per minute, so a 40-minute lecture is roughly 1.2 GB held in RAM. For anything past half an hour, drop to 720p or record in segments — most browsers get unhappy well before the file itself does.

Can I record system sound or audio from a video call?

Partly. Chrome and Edge on Windows can share tab audio and, for Entire Screen capture, system audio if you tick the checkbox in their picker. On macOS the browser cannot capture system output at all — that is an OS restriction, not a browser bug. Firefox does not offer tab audio either. Microphone capture works everywhere.

Why is there no MP4 download?

MediaRecorder in Chrome, Edge, and Firefox produces WebM (VP9 or VP8 with Opus). Converting to MP4 in the browser means shipping a WebAssembly build of FFmpeg — tens of megabytes of download and several minutes of re-encoding for a long clip. WebM plays in every modern browser, VLC, and Premiere, and YouTube, Drive, Slack, and Discord all accept it directly.

Does pausing split the file?

No. Pause and Resume drive the same MediaRecorder session, so the paused stretch is simply absent from the timeline and you get one continuous file. The timer counts recorded time only, which is also the length you see in the stats afterwards.

Can I record my webcam in the corner at the same time?

Not here. Picture-in-picture overlays need a canvas compositor drawing two video streams frame by frame, which is a different tool. A common workaround: open your camera preview in a floating window with the Webcam Test, then capture Entire Screen so the preview lands inside the recording.

Does this work on a phone or tablet?

No. getDisplayMedia is unavailable on iOS Safari and on Chrome for Android — mobile operating systems reserve screen capture for their own built-in recorders. Use the one in your phone's Control Centre or Quick Settings instead. On desktop, Chrome, Edge, Firefox, and Opera all work.

The recording looks blurry or the text is soft — how do I fix it?

Two usual causes. First, capturing Entire Screen on a 4K display and encoding at 1080p downscales everything, so pick Window or Tab capture instead. Second, VP9 spends its bitrate on motion: static text sharpens up a second after the frame settles. Bump the quality to 1440p and avoid scrolling quickly while you talk.

Free Online Screen Recorder — Record Your Screen in the Browser

Quality

Microphone Tab or system audio

Estimated size: —

0:00

Source: —

Record your whole screen, a single application window, or one browser tab, with your microphone and the sound the tab is playing. A live preview, a running timer, and pause/resume let you keep one take across several attempts. When you stop, the video plays back inside the page and downloads as a WebM file — the capture never leaves your device, so there is no watermark, no queue, and no length limit beyond your free disk space.

How it works

1
Pick quality and audio first Choose 1440p, 1080p, or 720p and tick the audio you need. Microphone captures your narration; tab audio captures whatever the page is playing. Both toggles matter before you start, because the browser only asks for these permissions once per capture.
2
Start recording and choose a source Click Start recording. The browser shows its own picker with three tabs: Entire Screen, Window, and Chrome Tab. Tab capture gives the sharpest text and is the only option that can include the page's own sound in Chrome and Edge.
3
Stop, review, and download Press Stop — or the browser's own Stop sharing bar — and the video appears in the player below with its length, size, resolution, and average bitrate. Play it back, then download the WebM. Nothing is saved until you click Download.

Your data stays private

All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.

Frequently asked questions

Is the video uploaded to a server?: No. getDisplayMedia hands the frames straight to MediaRecorder inside your tab and the result sits in memory as a blob. This site is static files on a CDN — there is no endpoint that could receive a video. The trade-off is that a reload throws the recording away, so download it before you close the tab.
How long can a recording be?: The tool sets no limit. Memory is the real ceiling: 1080p at the balanced preset runs about 30 MB per minute, so a 40-minute lecture is roughly 1.2 GB held in RAM. For anything past half an hour, drop to 720p or record in segments — most browsers get unhappy well before the file itself does.
Can I record system sound or audio from a video call?: Partly. Chrome and Edge on Windows can share tab audio and, for Entire Screen capture, system audio if you tick the checkbox in their picker. On macOS the browser cannot capture system output at all — that is an OS restriction, not a browser bug. Firefox does not offer tab audio either. Microphone capture works everywhere.
Why is there no MP4 download?: MediaRecorder in Chrome, Edge, and Firefox produces WebM (VP9 or VP8 with Opus). Converting to MP4 in the browser means shipping a WebAssembly build of FFmpeg — tens of megabytes of download and several minutes of re-encoding for a long clip. WebM plays in every modern browser, VLC, and Premiere, and YouTube, Drive, Slack, and Discord all accept it directly.
Does pausing split the file?: No. Pause and Resume drive the same MediaRecorder session, so the paused stretch is simply absent from the timeline and you get one continuous file. The timer counts recorded time only, which is also the length you see in the stats afterwards.
Can I record my webcam in the corner at the same time?: Not here. Picture-in-picture overlays need a canvas compositor drawing two video streams frame by frame, which is a different tool. A common workaround: open your camera preview in a floating window with the Webcam Test, then capture Entire Screen so the preview lands inside the recording.
Does this work on a phone or tablet?: No. getDisplayMedia is unavailable on iOS Safari and on Chrome for Android — mobile operating systems reserve screen capture for their own built-in recorders. Use the one in your phone's Control Centre or Quick Settings instead. On desktop, Chrome, Edge, Firefox, and Opera all work.
The recording looks blurry or the text is soft — how do I fix it?: Two usual causes. First, capturing Entire Screen on a 4K display and encoding at 1080p downscales everything, so pick Window or Tab capture instead. Second, VP9 spends its bitrate on motion: static text sharpens up a second after the frame settles. Bump the quality to 1440p and avoid scrolling quickly while you talk.

From the blog

How to Record Your Screen in a Browser Tab, With Sound Screen, window, or tab capture without installing anything — and the audio catch nobody warns you about. Read the post →

Free Online Screen Recorder — Record Your Screen in the Browser

How it works

Your data stays private

Frequently asked questions

From the blog

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