Online screen recorder: record screen, window & whiteboard without install
An online screen recorder runs in the browser without installing software. Excalicast records the whiteboard, the current tab, an app window, or the desktop, keeps the recording local-first, and exports MP4 in the aspect ratio each platform needs.
Short answer
Excalicast is an online screen recorder that runs in Chrome/Edge with no install. Choose the whiteboard, a tab, a window, or the desktop, record with voice, then export MP4 in multiple aspect ratios — free with a watermark, no account.
Workflow
- 1
Choose the source
Pick the whiteboard, the current tab, a specific app window, or the entire desktop — only what the explanation needs.
- 2
Set the frame
Choose 16:9, 9:16, 1:1, or a custom size so the crop matches where you will publish.
- 3
Record and narrate
Start recording and explain out loud. Mic audio stays aligned with what happens on screen.
- 4
Export MP4
Stop and export. Rendering happens locally in the browser; the watermarked export is free.
FAQ
Does online recording use up local disk space?
Recordings live in the browser (IndexedDB) and the MP4 renders locally, so nothing is uploaded unless you choose a cloud feature.
Can I combine whiteboard and screen recording?
Yes. Excalicast captures the whiteboard as an operation stream and can also record a tab, window, or desktop, then exports them through the same editing and rendering workflow.