LlamaIndex.TS is a framework designed for building applications based on large language models (LLMs). It focuses on helping users ingest, structure, and access private or domain-specific data. This framework provides a natural language interface to connect humans with inferred data, enabling developers to enhance their software capabilities through LLMs without needing to become experts in machine learning or natural language processing. LlamaIndex.TS supports popular runtime environments such as Node.js, Vercel Edge Functions, and Deno.