Screen Recorder: Screen, Webcam & Mic

How to use

Choose what to record with the switch at the top: Screen, Camera, Screen + camera, or Audio only.
In the settings, pick microphone on/off and device, format, quality, frame rate, countdown and time limit. “Check microphone level” lets you test the volume first.
Start with “Test recording (5 s)” to check picture, sound and format. Then click “Start recording” and pick the screen, window or tab to share in the browser prompt.
While recording you can pause, resume or stop. The browser’s “Stop sharing” button also ends the recording. With screen + camera you can move and resize the overlay while recording.
After you stop, a preview appears under “Recordings”. Click “Save” to write the file, “Delete” to discard it, or “Record again” to retry.

What it does

Four sources and a camera overlay

Switch between screen (whole screen, window or tab), camera, screen + camera and audio only. Screen + camera is composited on a canvas in your browser; the overlay’s corner, size and circle / rounded shape can be changed even while recording.

Mic and tab audio mixed

The microphone and — where the browser provides it — tab or system audio are mixed into one track with Web Audio. An input level meter shows before and during recording, and the mic can be switched on/off mid-recording.

Only formats that will work

The tool asks the browser with MediaRecorder.isTypeSupported and lists only the formats it can really record (WebM VP9 / VP8, MP4, and Opus / AAC for audio), so you never pick a format that fails.

Seekable WebM

The WebM that Chrome writes has no length information, so you cannot jump around with the seek bar. The recorded duration is added to the WebM header so both the preview and the saved file show their length and seek more easily.

Safety while recording

A REC badge and the tab title make recording obvious. Elapsed time excludes pauses; there is a time limit (5–60 min), a memory-protection stop at 2 GB, and a warning if you try to leave with unsaved recordings.

Size estimate and test recording

From your quality and time settings it shows the approximate size per minute and at the time limit. A 5-second test recording checks picture, sound and format before the real take.

Use cases

Record a software walkthrough for a manual or hand-over document
Share a bug reproduction with the screen and a voice explanation
Make tutorials or online lessons with your face in a corner overlay
Record a voice memo or your side of a meeting
Check screen sharing, camera and microphone input before a web meeting or stream

Capability matrix

Feature	Support	Notes
Record a screen, window or tab	Partial	Desktop Chrome / Edge / Firefox / Safari (Mac). Safari and Chrome on iPhone and many Android browsers do not support the screen-sharing API, so they cannot record the screen (at the time of writing)
Camera-only and audio-only recording	Supported	Also on mobile browsers (format depends on the browser)
Screen + camera overlay (position, size, circle / rounded)	Supported	Composited output is at most 1920×1080; larger screens are scaled down
Microphone recording with level meter	Supported	Mid-recording on/off works only if the mic was on at the start
Tab / system audio	Partial	Chrome / Edge only: tick “Also share tab audio” when sharing a tab (works on Mac too). System audio of a whole screen or window is mainly available on Windows and not on a Mac. Firefox and Safari provide neither tab nor system audio — only the mic is recorded
Mix microphone and tab audio	Supported	Only when tab / system audio is available
Save as WebM (VP9 / VP8 + Opus)	Partial	Offered in Chrome / Edge / Firefox. Safari traditionally offers MP4 only; newer versions may offer WebM (detected at run time)
Save as MP4 (H.264 + AAC)	Partial	Offered in Safari and recent Chrome / Edge. Firefox cannot record MP4 (at the time of writing)
Quality (bitrate), frame rate, countdown and time limit	Supported	Frame rate is a request; it can come out lower depending on the source and browser
Pause, resume, auto-finish on “Stop sharing”	Supported	—
Preview, save / delete several takes, record again	Supported	—
WebM duration fix and seeking	Partial	Chrome-style WebM gets its duration fixed. If a file cannot be fixed, the seek bar may not work
Converting after recording (WebM → MP4…), trimming, editing	Not supported	Too heavy to do here. If you need MP4, record in a browser that offers it
Cloud storage or share links	Not supported	Data never leaves your device
Shortcut (Alt + Shift + R) while another window is in front	Not supported	Works only while this tab is active. While recording, stop with the stop button of the shared window or the browser’s sharing bar

Limits & notes

Recorded data is collected in chunks of one second in the browser’s memory (RAM). Long or high-quality recordings can fail when memory runs out. Rule of thumb: 60 minutes at Standard (4 Mbps) with audio is about 1.7 GB; at High (8 Mbps) it would be about 3.4 GB, so recording stops automatically at 2 GB.
Screen-share resolution and frame rate depend on what you share, the browser and your device. Choosing 60 fps may still give about 30 fps.
If the shared window is resized during a screen + camera recording, the output size stays as it was at the start (extra space is black).
Recordings disappear when you close or reload the page. Always click “Save” to write a file (you get a warning when leaving with unsaved recordings).
DRM-protected video (e.g. streaming services) may appear black when shared.
Time spent paused is not counted in the recording length or the time limit.
In-app browsers (e.g. inside social apps) may block screen sharing, camera and microphone.

Privacy & safety

Screen, camera and microphone video and audio are recorded, composited and played back only inside your browser; nothing is sent to a server. Recordings live in memory and a file is written to your device only when you click “Save”. While recording, the browser itself also shows that sharing is active.

FAQ

Why is there no sound in my screen recording?

Tab or screen audio is recorded only if you tick “Also share tab audio” (Chrome / Edge) in the browser’s share picker. System audio of a whole screen or window is available mainly on Windows and not on a Mac (tab audio from a Chrome / Edge tab share does work on a Mac). Firefox and Safari provide neither, so only the microphone is recorded. If you use the mic, also check that the browser and OS allow it.

Can I record and save as MP4? How is it different from WebM?

If MP4 appears under “Format”, you can record straight to MP4 (Safari, recent Chrome / Edge). Browsers such as Firefox that do not list MP4 record WebM instead. WebM may not open in some Windows players or editors; in that case record in an MP4-capable browser or use a converter. This tool does not convert after recording.

The recording shows no length and I cannot seek

The WebM that Chrome writes has no duration information. This tool adds the recorded duration to the file header to work around it. If you still cannot seek, open the saved file in a video player such as VLC.

Can I overlay my camera on the screen recording?

Choose “Screen + camera” at the top. Your camera appears in a corner of the screen as a circle or rounded rectangle. You can change its position, size and shape even while recording, or click the preview to move it to the nearest corner.

Can I record my iPhone or Android screen?

Safari and Chrome on iPhone, and many Android browsers, cannot share the screen from a web page. Use your phone’s built-in screen recording. This tool can still record a phone’s “Camera” or “Audio only”.

Are my recordings uploaded anywhere?

No. Recording, compositing and playback all happen inside your browser and nothing is sent to a server. Recordings stay in memory and a file is written to your device only when you click “Save”.

Last updated: 2026-10-12