Breaking

Neo4j's Open-Source LLM Graph Builder Turns PDFs and Videos into Knowledge Graphs

September 9, 2026 at 18:28 EDT

Foundation Models
Software Dev & Coding
Open Source

Neo4j's open-source LLM Knowledge Graph Builder converts PDFs, documents, web pages and YouTube transcripts into structured knowledge graphs stored in Neo4j. Built around LangChain's graph-transformation tooling, the application is designed to make unstructured information searchable, explainable and usable in GraphRAG applications.

OPEN-SOURCE PROJECT · NEO4J

From PDFs to connected knowledge

Neo4j's LLM Knowledge Graph Builder uses LangChain and large language models to turn documents, web pages and YouTube transcripts into searchable graph data.

The transformation

1 · IngestPDFs, documents, web pages and transcripts

→

2 · ExtractChunks, embeddings, entities and relationships

→

3 · QueryGraphRAG, vector, hybrid and Text2Cypher search

Developer interest at a glance

Public repository signals, shown on a proportional scale

5.2k

Stars

878

Forks

Where it fits

Connected retrieval for document analysis, summarization and conversational data access.

What still matters

Schema design, entity resolution and validation remain important for reliable graphs.

IMPLEMENTATION NOTE

The strongest documented results are for long-form English text; tabular and visual material is less suitable.

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