Black Screen Record is a serverless, privacy-first web application designed to let you record high-definition video and audio on iPhone, Android, and PC using a battery-saving blackout screen overlay. By dimming screen pixels to solid black and halting live graphic rendering, the app simulates a locked screen state while keeping the browser awake to record continuously. What makes it new or different? Traditional recording tools suffer from three major issues: they drain mobile batteries rapidly by keeping viewfinders fully lit, they require installing native app store packages containing invasive trackers, or they force you to upload your video streams to remote cloud servers. Black Screen Record operates entirely inside your client-side browser sandbox. You don't need to install unverified executable files or store bundles. We use the browser's native MediaRecorder API to process video chunks locally on your CPU. Videos are saved directly to your device's storage using IndexedDB. To prove our privacy promises, the application enforces a strict Content Security Policy (CSP) that blocks all outbound external network connections. It is physically impossible for your video recordings to leak or be uploaded. Key Standout Features: OLED Battery Preservation: On OLED and AMOLED screens, black pixels (#000000) are fully turned off, drawing zero power. The blackout overlay turns off your screen's pixels during active recording, significantly extending device battery life. GPU Viewfinder Halting: Halting the rendering of the active viewfinder stream reduces GPU and processor temperatures, preventing mobile devices from overheating during long recording sessions. Screen Wake Lock API: Bypasses mobile OS sandboxes (which suspend background browser processes when the screen sleeps) by forcing the browser tab to stay active in the foreground while displaying a black screen. Pocket Touch Protection: The slide-to-unlock widget automatically fades out after 4 seconds of inactivity. A simple double-tap anywhere wakes the slider back up, preventing accidental touch inputs from interrupting your recording.

Black Screen Record

blackscreenrecord, recorder

blackscreenrecord, recorder