!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){var t=null;try{t=new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}return t}()||function(){var t=null;try{t=localStorage.getItem("theme")}catch(t){}return t}();t(null!==e?e:"light")}(),document.documentElement.setAttribute("data-announcement-bar-initially-dismissed",function(){try{return"true"===localStorage.getItem("docusaurus.announcement.dismiss")}catch(t){}return!1}())

[Skip to main content](#__docusaurus_skipToContent_fallback)

LangChain v0.2 is coming soon! Preview the new docs [here](/v0.2/docs/introduction/).

[

![🦜️🔗 Langchain](/v0.1/img/brand/wordmark.png)![🦜️🔗 Langchain](/v0.1/img/brand/wordmark-dark.png)

](/v0.1/)[Docs](/v0.1/docs/get_started/introduction/)[Use cases](/v0.1/docs/use_cases/)[Integrations](/v0.1/docs/integrations/platforms/)[API Reference](https://api.js.langchain.com)

[More](#)

*   [People](/v0.1/docs/people/)
*   [Community](/v0.1/docs/community/)
*   [Tutorials](/v0.1/docs/additional_resources/tutorials/)
*   [Contributing](/v0.1/docs/contributing/)

[v0.1](#)

*   [v0.2](https://js.langchain.com/v0.2/docs/introduction)
*   [v0.1](/v0.1/docs/get_started/introduction/)

[🦜🔗](#)

*   [LangSmith](https://smith.langchain.com)
*   [LangSmith Docs](https://docs.smith.langchain.com)
*   [LangChain Hub](https://smith.langchain.com/hub)
*   [LangServe](https://github.com/langchain-ai/langserve)
*   [Python Docs](https://python.langchain.com/)

[Chat](https://chatjs.langchain.com)[](https://github.com/langchain-ai/langchainjs)

Search

*   [Get started](/v0.1/docs/get_started/)
    
    *   [Introduction](/v0.1/docs/get_started/introduction/)
    *   [Installation](/v0.1/docs/get_started/installation/)
    *   [Quickstart](/v0.1/docs/get_started/quickstart/)
*   [LangChain Expression Language](/v0.1/docs/expression_language/)
    
    *   [Get started](/v0.1/docs/expression_language/get_started/)
    *   [Why use LCEL?](/v0.1/docs/expression_language/why/)
    *   [Interface](/v0.1/docs/expression_language/interface/)
    *   [Streaming](/v0.1/docs/expression_language/streaming/)
    *   [How to](/v0.1/docs/expression_language/how_to/routing/)
        
    *   [Cookbook](/v0.1/docs/expression_language/cookbook/)
        
    *   [LangChain Expression Language (LCEL)](/v0.1/docs/expression_language/)
*   [Modules](/v0.1/docs/modules/)
    
    *   [Model I/O](/v0.1/docs/modules/model_io/)
        
        *   [Quickstart](/v0.1/docs/modules/model_io/quick_start/)
        *   [Concepts](/v0.1/docs/modules/model_io/concepts/)
        *   [Prompts](/v0.1/docs/modules/model_io/prompts/)
            
        *   [LLMs](/v0.1/docs/modules/model_io/llms/)
            
        *   [Chat Models](/v0.1/docs/modules/model_io/chat/)
            
        *   [Model I/O](/v0.1/docs/modules/model_io/)
        *   [Output Parsers](/v0.1/docs/modules/model_io/output_parsers/)
            
            *   [Quick Start](/v0.1/docs/modules/model_io/output_parsers/quick_start/)
            *   [Custom output parsers](/v0.1/docs/modules/model_io/output_parsers/custom/)
            *   [Output Parser Types](/v0.1/docs/modules/model_io/output_parsers/types/)
                
                *   [String output parser](/v0.1/docs/modules/model_io/output_parsers/types/string/)
                *   [HTTP Response Output Parser](/v0.1/docs/modules/model_io/output_parsers/types/http_response/)
                *   [JSON Output Functions Parser](/v0.1/docs/modules/model_io/output_parsers/types/json_functions/)
                *   [Bytes output parser](/v0.1/docs/modules/model_io/output_parsers/types/bytes/)
                *   [Combining output parsers](/v0.1/docs/modules/model_io/output_parsers/types/combining_output_parser/)
                *   [List parser](/v0.1/docs/modules/model_io/output_parsers/types/csv/)
                *   [Custom list parser](/v0.1/docs/modules/model_io/output_parsers/types/custom_list_parser/)
                *   [Datetime parser](/v0.1/docs/modules/model_io/output_parsers/types/datetime/)
                *   [OpenAI Tools](/v0.1/docs/modules/model_io/output_parsers/types/openai_tools/)
                *   [Auto-fixing parser](/v0.1/docs/modules/model_io/output_parsers/types/output_fixing/)
                *   [Structured output parser](/v0.1/docs/modules/model_io/output_parsers/types/structured/)
                *   [XML output parser](/v0.1/docs/modules/model_io/output_parsers/types/xml/)
    *   [Retrieval](/v0.1/docs/modules/data_connection/)
        
    *   [Chains](/v0.1/docs/modules/chains/)
    *   [Agents](/v0.1/docs/modules/agents/)
        
    *   [More](/v0.1/docs/modules/memory/)
        
*   [Security](/v0.1/docs/security/)
*   [Guides](/v0.1/docs/guides/)
    
*   [Ecosystem](/v0.1/docs/ecosystem/)
    
*   [LangGraph](/v0.1/docs/langgraph/)
*   * * *
    

*   [](/v0.1/)
*   [Modules](/v0.1/docs/modules/)
*   [Model I/O](/v0.1/docs/modules/model_io/)
*   [Output Parsers](/v0.1/docs/modules/model_io/output_parsers/)
*   [Output Parser Types](/v0.1/docs/modules/model_io/output_parsers/types/)
*   String output parser

On this page

String output parser
====================

The `StringOutputParser` takes language model output (either an entire response or as a stream) and converts it into a string. This is useful for standardizing chat model and LLM output.

This output parser can act as a transform stream and work with streamed response chunks from a model.

Usage[​](#usage "Direct link to Usage")
---------------------------------------

tip

See [this section for general instructions on installing integration packages](/v0.1/docs/get_started/installation/#installing-integration-packages).

*   npm
*   Yarn
*   pnpm

    npm install @langchain/openai

    yarn add @langchain/openai

    pnpm add @langchain/openai

    import { ChatOpenAI } from "@langchain/openai";import { StringOutputParser } from "@langchain/core/output_parsers";const parser = new StringOutputParser();const model = new ChatOpenAI({ temperature: 0 });const stream = await model.pipe(parser).stream("Hello there!");for await (const chunk of stream) {  console.log(chunk);}/*  Hello  !  How  can  I  assist  you  today  ?*/

#### API Reference:

*   [ChatOpenAI](https://api.js.langchain.com/classes/langchain_openai.ChatOpenAI.html) from `@langchain/openai`
*   [StringOutputParser](https://api.js.langchain.com/classes/langchain_core_output_parsers.StringOutputParser.html) from `@langchain/core/output_parsers`

* * *

#### Help us out by providing feedback on this documentation page:

[

Previous

Output Parser Types

](/v0.1/docs/modules/model_io/output_parsers/types/)[

Next

HTTP Response Output Parser

](/v0.1/docs/modules/model_io/output_parsers/types/http_response/)

*   [Usage](#usage)

Community

*   [Discord](https://discord.gg/cU2adEyC7w)
*   [Twitter](https://twitter.com/LangChainAI)

GitHub

*   [Python](https://github.com/langchain-ai/langchain)
*   [JS/TS](https://github.com/langchain-ai/langchainjs)

More

*   [Homepage](https://langchain.com)
*   [Blog](https://blog.langchain.dev)

Copyright © 2024 LangChain, Inc.