Anime4Nerd: Anime Upscaler & Video Enhancer (Anime4K)

Anime upscaler for any web video: real-time Anime4K 2x–8x upscaling on your GPU. Sharper lines, less blur. Runs locally.

An anime upscaler and video enhancer for the browser. Anime4Nerd runs the open-source Anime4K shaders on any web video, in real time. Switch a video on and it is restored and upscaled 2× (or more) on your GPU while it plays: sharper anime lines, less blur, less noise. A 1080p episode becomes 4K; 720p becomes 1440p, or 4K at 4×. What you get • Six presets: Mode A / B / C and their stronger A+A / B+B / C+A variants • Optional line effects: darken lines, thin lines • Upscale factor: auto (4× when a small video is shown large), or 2× up to 32×, capped to what your GPU can hold • Fullscreen menu: change preset, line effects and upscale factor without leaving fullscreen, including embedded players and F11 • Works on embedded players too (videos inside iframes are found automatically) • Live performance panel: GPU % per frame, ms, output fps, late frames, 2-second graph • Per-site switch that is remembered, so the next episode is already upscaled • Something wrong? The bug icon in the popup opens a short report form with your version filled in How it works The original Anime4K GLSL shaders by bloc97 are loaded unchanged and run through WebGL2. Each video frame goes through the chosen chain of convolution passes and the result is drawn on a canvas over the player. The networks upscale exactly 2× per pass (1080p → 2160p); higher factors chain extra 2× passes. Privacy No personal data is collected automatically; no network requests, no accounts. It only finds videos on the page and does nothing until you switch one on, and the video stays on your machine. The popup's bug icon and the page shown after removal open optional forms on our website; they send only what you write (and any screenshots you attach), and only when you press send. Full policy: https://anime4nerd.pages.dev/privacy Requirements Chrome / Brave / Edge 116+, a GPU with WebGL2. The video must be served with CORS (most players do this). DRM video (Widevine) cannot be read by any extension. Not affiliated with bloc97 or any streaming site. Anime4K is MIT licensed. Screenshot credits: the before/after image uses "A snapshot from the 2012 demo release from the Morevna Project" by Morevna Project (morevnaproject.org), licensed CC BY 3.0 (creativecommons.org/licenses/by/3.0). Cropped and upscaled for comparison. No endorsement implied.