Ultrafill — Zoom Video to Fill

Zoom and crop HTML5 video to fill your screen, removing letterbox and pillarbox bars on ultrawide displays and cinematic content.

Ultrafill fits HTML5 video to your player, reducing letterbox and pillarbox bars on ultrawide and other displays. - Zoom, crop and pan with the toolbar, player controls or keyboard shortcuts. - Detect stable black bars automatically, or choose cinematic, ultrawide and custom picture ratios. - Place the player button in any corner and choose automatic hiding, always visible or hidden. - Adjust brightness, contrast, saturation and shadows. Optional controls add elastic stretch, sharpness, vibrance, ambience and motion interpolation. - Save named profiles and remember framing for a video, tab, site or globally. - Choose panel themes and size, manage site rules, and export or import settings. Pixel effects require readable video frames and WebGL2. Protected or unreadable streams retain ordinary playback and manual framing. Use player/wrapper fullscreen for pixel effects. Motion interpolation adds approximately one source-frame of visual delay. HDR highlight boost additionally requires a known SDR source, supported WebGPU extended output and an HDR display. Expensive effects start off, and processing adapts to load. Settings are local by default. Optional browser-account sync carries preferences, profiles and chosen site rules; saved site/tab viewing state, video frames and audio samples are excluded. Free and open source under the MIT license. No ads, analytics, subscriptions or premium gates. Shortcuts: Alt+Z toggles fill; Alt+Up/Down adjusts zoom; Alt+X resets. Rebind shortcuts at chrome://extensions/shortcuts. Project: https://redbulllunatic.codeberg.page/ultrafill/ Source and contributions: https://codeberg.org/redbulllunatic/ultrafill Bug reports: https://codeberg.org/redbulllunatic/ultrafill/issues