SillyTavern

SillyTavern is an open-source, highly customizable frontend interface designed for power users who want to interact with large language models (LLMs) beyond simple chatbots. It connects to a wide variety of backends—including OpenAI, Anthropic, Google, local models via KoboldCPP or text-generation-webui, and many others—providing a unified chat environment with advanced features like character creation, worldbuilding, and extensive prompt control. Unlike typical chat interfaces, SillyTavern offers deep configuration options for system prompts, context management, and model parameters, making it ideal for roleplaying, storytelling, and complex AI-assisted workflows. SillyTavern is built for users who are comfortable with self-hosting and tinkering. It runs locally via Node.js and can be accessed through a web browser, giving users full control over their data and privacy. The platform supports extensions, custom scripts, and a thriving community that contributes themes, character cards, and plugins. Its difference lies in its uncompromising flexibility: every aspect of the interaction can be fine-tuned, from the way messages are formatted to how memories are managed. For those who want to use it without running a local server, there are hosted options like SillyTavern AI, a managed cloud service that simplifies setup while retaining most customization. The project is actively maintained on GitHub, with frequent updates driven by community feedback. SillyTavern is not a beginner-friendly tool; it assumes technical literacy and a willingness to configure settings manually. However, for advanced users, it offers an unmatched level of control over LLM interactions.