DemoRecorder · Studio
Screen recording & input logger.
on-device · .webm + JSON export
Record your screen, watch a live preview with a running timer, log key and mouse input with timestamps while you record, and export .webm video plus a JSON event dataset. All processing stays on-device.
1 · Screen capture
Real getDisplayMedia + MediaRecorder capture. All processing stays on-device — nothing uploads.
This browser does not expose screen capture — open this page in Chrome or Edge on desktop (HTTPS or localhost).
00:00
Ready — screen capture stays on this device. Nothing uploads.
Stop a recording to unlock the .webm download.
2 · Input-event logger
While recording, key presses and mouse coordinates are logged with timestamps into a live list below.
Keys
0
Clicks
0
Mouse moves
0
Total
0
No input events yet — start recording, then type or move the mouse.