Document loader integrations

Integrate with document loaders using LangChain JavaScript.

Document loaders provide a standard interface for reading data from different sources (such as Slack, Notion, or Google Drive) into LangChain’s Document format. This ensures that data can be handled consistently regardless of the source.

All document loaders implement the BaseLoader interface.

Interface

Each document loader may define its own parameters, but they share a common API:

• load(): Loads all documents at once.
• loadAndSplit(): Loads all documents at once and splits them into smaller documents.

import { OracleDocLoader } from "@oracle/langchain-oracledb";

const loader = new OracleDocLoader(,
  ...  // <-- Integration specific parameters here
);
const data = await loader.load();

By category

LangChain.js categorizes document loaders in two different ways:

• File loaders, which load data into LangChain formats from your local filesystem.
• Web loaders, which load data from remote sources.

File loaders

If you’d like to contribute an integration, see Contributing integrations.

Common file types

Document Loader	Description	Package/API
DirectoryLoader	Load all files from a directory with custom loader mappings	Package
JSON	Load JSON files using JSON pointer to target specific keys	Package
JSONLines	Load data from JSONLines/JSONL files	Package
Text	Load plain text files	Package

Specialized file loaders

Document Loader	Description	Package/API
MultiFileLoader	Load data from multiple individual file paths	Package
OracleDocLoader	Ingest Oracle AI Vector Search tables or Oracle Text-supported files	Package

Web loaders

Cloud providers

Document Loader	Description	Web Support	Package/API
Google Cloud SQL for PostgreSQL	Load documents from Cloud SQL PostgreSQL databases	✅	Package

Audio & video

Document Loader	Description	Web Support	Package/API
Soniox	Transcribe multilingual audio files with optional translation using Soniox API	✅	API

Other

Document Loader	Description	Web Support	Package/API
LangSmith	Load datasets and traces from LangSmith	✅	API

All document loaders

DirectoryLoader

View guide

Google Cloud SQL for PostgreSQL

View guide

JSON

View guide

JSONLines

View guide

LangSmith

View guide

MultiFileLoader

View guide

OracleDocLoader

View guide

Soniox

View guide

Text

View guide

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