Online Screen Recorder
Record your full screen, a window or a browser tab at 720p/1080p/4K: system audio and microphone mixed in real time, pause and resume, optional countdown and live preview. The video stays in your browser until you download it as WebM or MP4 — no watermark, no duration limits.
About audio recording
Chrome and Edge (Windows) can capture system audio: enable «share system/tab audio» in the picker dialog. Firefox records only the chosen tab (no full system audio) and Safari lacks screen capture before version 17. Without a mic, browsers won't record other tabs' audio — that's a privacy protection, not a limitation of this tool.
Built by
Miguel Ángel Colorado Marin (MACM)
Built by
Miguel Ángel Colorado Marin (MACM)
Full-Stack Developer · Guadalajara, España
I develop web apps, digital tools and full projects — from design to deployment.
Recording your screen shouldn't require installing software or paying a subscription to remove a watermark. This tool uses the browser's native capture (getDisplayMedia + MediaRecorder): you pick the exact source — screen, window or tab — in the browser's official dialog, record up to 4K at 12 Mbps or 1080p at 8 Mbps, and mix system audio with your microphone in real time via the Web Audio API. The recording is processed entirely in the browser: no uploads, no server, no duration limit beyond your disk. Pause and resume without breaking the file, a 3-second countdown to get ready, and download when done. One honest caveat: browsers restrict which audio can be captured (Firefox records only the chosen tab, Safari needs version 17+), and the tool itself explains that.
Features
- ✓Full screen, window or tab: you pick the source in the browser's own picker
- ✓Up to 4K at 12 Mbps or 1080p at 8 Mbps, at 30 or 60 fps
- ✓System audio and microphone mixed in real time with the Web Audio API
- ✓Pause, resume, 3-second countdown and live preview
- ✓Instant download as WebM (or MP4 if your browser supports it), nothing uploaded
How to record your screen online?
- 1
Set quality and audio
Pick 1080p or 4K, 30 or 60 fps, and whether your microphone gets recorded alongside system audio.
- 2
Pick the source
The browser shows its official dialog: choose the screen, window or tab. Enable «share audio» to record the sound too.
- 3
Record with pauses
The timer runs on screen; pause and resume as many times as you like without splitting the file.
- 4
Stop and download
On stop the video is assembled and the preview appears: download it as WebM or MP4 instantly.
Frequently asked questions
Is system audio recorded or only my voice?
Both, mixed in real time. In the browser dialog, enable «share tab audio» (Chrome/Edge on Windows can also offer full system audio) and enable «Include my microphone»: both mix into a single audio track in the video. Firefox limits capture to the chosen tab's audio.
What format and quality does it produce?
Recordings go out as WebM (VP9/Opus on Chrome and Firefox), the web's native format and the best quality-per-byte; if your browser can record MP4 (H.264/AAC), it's used automatically. Quality is chosen up front: up to 4K at 12 Mbps, 1080p at 8 Mbps or 720p at 5 Mbps, at 30 or 60 fps. No watermark, no duration limit.
Can anyone see what I record?
No. Capture and encoding happen inside your browser: video chunks accumulate in memory and are assembled locally on stop. There is no upload — verify it in your dev tools network tab: no request happens while recording.
Related tools
Embed Online Screen Recorder on your site
Add Online Screen Recorder to any web page with a simple iframe. Free, with attribution to miguelacm.es.
<iframe
src="https://miguelacm.es/embed/screen-recorder"
width="100%"
height="700"
frameborder="0"
title="Online Screen Recorder — miguelacm.es"
></iframe>