hamzayslmn/open-razerkit

Open-razerkit is a small tool that lets you control the RGB lighting, effects, and settings on Razer devices (mice, keyboards, headsets, and laptops) without installing Razer's official Synapse software. It talks directly to the device over USB, sets what you want, and then exits. Nothing runs in the background afterward. The tool has two ways to use it. The command-line version is written in Python and works on Windows and Linux. You run a command, the setting is applied, and done. You can set the lighting to a specific color by name or hex code, choose effects like breathing or spectrum cycling, or turn the lights off. Settings are saved to the device's onboard memory by default, so they persist even after you unplug the USB cable. The browser version runs in Chrome or Edge using a web technology called WebHID, which allows web pages to talk directly to USB devices. No installation is required for the browser version at all. Beyond lighting, the tool can also set mouse DPI, polling rate, headset equalizer settings for certain BlackShark models, and for Razer Blade laptops it can set performance modes and cap the battery charge limit. All settings are stored on the device, so no software needs to be running to keep them active. Game detection is also built in. You can save a named lighting profile and configure it to activate automatically when a specific game is in the foreground, then revert to a default when the game closes. The Python version requires no third-party packages and uses Python's standard library only. The browser version requires no installation at all. Linux users need either sudo or a one-time udev rule to access the device.