Vanilla "Chara" Chat | Free Material for Personal Development

【Free Materials for Personal Development】High-performance AI chat & character chat that runs in a single file.
Operates immediately with just one HTML file, freely modifiable and embeddable vanilla UI series.
Ultimate simplicity: Complete with just one HTML file. Enter your API key and it works right away.
Multi-LLM support: OpenAI, Gemini, Ottemoto LLM (one-time purchase API), and local systems like Ollama/LM Studio are all compatible.
Developer-first: Includes speed meter and token measurement so you can see response times and bottlenecks at a glance.
Character personality and emotions configurable: Includes AI character chat with emotional parameters.
Completely free: MIT License. Modification, redistribution, and embedding in your own apps are all permitted.
Ideal for education and prototyping: Can be used as Vibecoding teaching materials or as a component set for UI generation.