Rinkaku - GPU Video Enhancer by ゆろち

Rinkaku is a Firefox extension that processes playing video locally on your GPU to reduce compression artifacts and make edges and fine detail easier to see.

It is designed for low-resolution streams such as 360p and 480p and for older uploads with visible block noise, ringing around edges, or uneven gradients. Video enhancement stays on your device. Rinkaku does not upload video frames, page URLs, or viewing history.

■ Features
・Separate Anime and Live-action modes
・Low, Medium, and High strength levels
・Automatic workload reduction when processing cannot keep up with playback
・Upscaling only when the display size benefits from it
・Per-channel settings on YouTube, per-account settings on X, and per-domain settings elsewhere
・Alt+R to toggle processing and Alt+Shift+R to switch modes
・Compatibility with extensions that apply CSS display filters such as gamma adjustment

■ Trial, purchase, and authentication
All features are available during a 14-day free trial. Continued use costs JPY 1,980 as a one-time purchase, with no subscription or device limit.

Purchased licenses are authenticated with a six-digit code sent to the purchase email address. Stripe processes card details directly; Kagayoi does not receive card numbers.

■ Requirements
Rinkaku requires Firefox 142 or later on Windows and a GPU environment where WebGPU is available. DRM-protected video and environments where WebGPU is disabled are not supported. Some sites may be incompatible because of their video delivery method or page structure.

■ Privacy
Rinkaku does not transmit video, page URLs, or viewing history. Network access is limited to the purchase page, email verification codes, license authentication, and license validity checks. See the privacy policy for details.