No upload, 100% local, no account

Screen recorder

Capture your screen, preview it, and download the video. Everything stays on your device.

How Screen recorder works

Screen recorder captures your screen, a single window, a browser tab, or the entire display, then saves the footage as a WebM video file in your browser. No installation is needed. The capture uses the browser's built-in getDisplayMedia API combined with MediaRecorder, so the video stream is encoded locally and offered as a download without any data touching a server.

What gets captured is decided in the browser's own share dialog, which also controls audio: depending on the platform, you can include tab audio or system sound along with the picture (Chrome offers tab audio everywhere, full system audio mainly on Windows). While recording you get a live timer and pause/resume controls, and the take ends with a playback preview so you can check the result before downloading the timestamped file. Video is encoded as WebM with the VP9 or VP8 codec; browsers without WebM support fall back to MP4. One honest limitation: screen capture is a desktop feature, mobile browsers do not expose it, and the page tells you so instead of failing silently.

Written by Bastien Sulyan

How to use Screen recorder, step by step

  1. Click Start recording. Your browser will open a share-screen dialog.
  2. Choose what to capture: the whole screen, a specific window, or a single tab.
  3. If you want sound, tick the share-audio option in the browser dialog: tab audio is available in Chrome and Edge on any OS, full system audio mainly on Windows. Firefox offers no audio with screen capture.
  4. Click Share in the browser dialog to begin the recording.
  5. Click Stop in the toolbar or on this page when you are done.
  6. The recorded video appears immediately. Click Download to save it.

Common use cases

  • Recording a software demo or tutorial to share with teammates without uploading to a cloud service.
  • Capturing a bug reproduction steps to attach to a bug report.
  • Saving a video walkthrough of a website for a client review.
  • Archiving a live video call or screen share for personal reference (check your local consent laws first).

Frequently asked questions

Does the screen recording get sent to a server?

No. The getDisplayMedia stream goes directly into a MediaRecorder running in your browser tab. The encoded chunks are held in tab memory and assembled into a Blob when you stop. That Blob is then offered as a local download. No video data is transmitted to Sunasty or anywhere else. You can confirm this: open DevTools, go to the Network tab, start a recording, and watch, you will see no outbound requests carrying video data.

Can I record audio as well as video?

Two independent sources feed audio into a recording. System/tab audio comes from the browser's own share dialog: the audio checkbox there covers tab audio (Chrome and Edge, on any OS) or full system audio (mainly Chrome and Edge on Windows; macOS restricts it, and Firefox and Safari offer no audio at all with screen capture). Separately, the page has an "Also record microphone" toggle: turning it on asks for microphone access and mixes your voice into the recording locally in the browser, so a voice-over works even on Firefox or Safari, or when you share a window instead of a tab. If the browser gives no system audio and the microphone is off (or its permission is denied), the page shows a clear warning before you download a silent file instead of leaving you to find out on playback. iOS does not support screen capture at all.

Which browsers support screen recording?

Recent versions of Chrome, Edge, and Firefox on desktop (Windows, macOS, Linux) support getDisplayMedia and therefore screen recording. iOS Safari does not support screen capture via the browser. Android support varies by browser version.

What format is the output?

A WebM video file (typically VP9 or VP8 video + Opus audio). WebM is widely supported on desktop and most mobile browsers. If you need MP4, you can convert the WebM using the video-converter tool on this site after recording.

Is there a maximum recording length?

There is no server-imposed time limit. The practical limit is your device memory: recorded chunks accumulate in the browser tab. For very long sessions, stop and save periodically. A typical 10-minute screen recording at moderate quality uses a few hundred megabytes of RAM during capture.

Is the recorder free and is a sign-up required?

It is free with no account required. No watermarks are added to your video. Recorded files are stored on your device only and are never shared with Sunasty.