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</li></ul></nav></div></div></aside><main class="docMainContainer_TBSr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Flows</span></li><li class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link">Build flows</span></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Build flows</h1></header><p>A <em>flow</em> is a functional representation of an application workflow.
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Flows receive input, process it, and produce output.</p>
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<p>Flows consist of <em>components</em> that represent individual steps in your application's workflow.</p>
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<p><img decoding="async" loading="lazy" alt="Basic Prompting flow in the workspace" src="/assets/images/workspace-basic-prompting-61154cb9a883e7d5862f6c3d272add85.png" width="4000" height="2188" class="img_ev3q"></p>
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<p>Langflow flows are fully serializable and can be saved and loaded from the file system where Langflow is installed.</p>
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<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_BuS1"><p>To try building and running a flow in a few minutes, see the <a href="/get-started-quickstart">Langflow quickstart</a>.</p></div></div>
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||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="create-a-flow">Create a flow<a href="#create-a-flow" class="hash-link" aria-label="Direct link to Create a flow" title="Direct link to Create a flow"></a></h2>
|
||
<p>From the <a href="#projects"><strong>Projects</strong> page</a>, there are four ways to create a flow:</p>
|
||
<ul>
|
||
<li>
|
||
<p><strong>Create a blank flow</strong>: Select a project, click <strong>New Flow</strong>, and then click <strong>Blank Flow</strong>.</p>
|
||
</li>
|
||
<li>
|
||
<p><strong>Create a flow from a template</strong>: Select a project, click <strong>New Flow</strong>, and then click the template that you want to use.</p>
|
||
<details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>What are templates?</summary><div><div class="collapsibleContent_i85q"><p>Templates are pre-built flows that you can use as a starting point for your own flow.
|
||
They range from basic flows with a few components to complex flows with many components and sub-flows.</p><p>For example, the <strong>Basic Prompting</strong> template demonstrates a small flow that passes both chat input and pre-defined instructions (as a prompt) to an LLM.
|
||
In contrast, the <strong>Vector Store RAG</strong> template consists of two sub-flows that demonstrate how to create a Retrieval Augmented Generation (RAG) chatbot. One sub-flow populates the vector store with contextually relevant data and embeddings, and the other sub-flow queries the vector store for similar data to answer user questions.</p><p>You can also <a href="/contributing-templates">contribute templates</a> to the Langflow codebase.</p></div></div></details>
|
||
</li>
|
||
<li>
|
||
<p><strong>Duplicate an existing flow</strong>: Locate the flow you want to copy, click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-ellipsis" aria-hidden="true"><circle cx="12" cy="12" r="1"></circle><circle cx="19" cy="12" r="1"></circle><circle cx="5" cy="12" r="1"></circle></svg> <strong>More</strong>, and then select <strong>Duplicate</strong>.</p>
|
||
</li>
|
||
<li>
|
||
<p><strong>Import a flow</strong>: See <a href="/concepts-flows-import">Import and export flows</a>.</p>
|
||
</li>
|
||
</ul>
|
||
<p>You can also create a flow with the <a href="/api-flows">Langflow API</a>, but the Langflow team recommends using the <a href="/concepts-overview">visual editor</a> until you are familiar with flow creation.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="add-components">Add components<a href="#add-components" class="hash-link" aria-label="Direct link to Add components" title="Direct link to Add components"></a></h3>
|
||
<p>Flows consist of <a href="/concepts-components">components</a>, which are nodes that you configure and connect in the <a href="/concepts-overview#workspace">workspace</a>.
|
||
Each component performs a specific task, like serving an AI model or connecting a data source.</p>
|
||
<p>Drag and drop components from the <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-component" aria-hidden="true"><path d="M15.536 11.293a1 1 0 0 0 0 1.414l2.376 2.377a1 1 0 0 0 1.414 0l2.377-2.377a1 1 0 0 0 0-1.414l-2.377-2.377a1 1 0 0 0-1.414 0z"></path><path d="M2.297 11.293a1 1 0 0 0 0 1.414l2.377 2.377a1 1 0 0 0 1.414 0l2.377-2.377a1 1 0 0 0 0-1.414L6.088 8.916a1 1 0 0 0-1.414 0z"></path><path d="M8.916 17.912a1 1 0 0 0 0 1.415l2.377 2.376a1 1 0 0 0 1.414 0l2.377-2.376a1 1 0 0 0 0-1.415l-2.377-2.376a1 1 0 0 0-1.414 0z"></path><path d="M8.916 4.674a1 1 0 0 0 0 1.414l2.377 2.376a1 1 0 0 0 1.414 0l2.377-2.376a1 1 0 0 0 0-1.414l-2.377-2.377a1 1 0 0 0-1.414 0z"></path></svg> <strong>Core components</strong> and <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-blocks" aria-hidden="true"><rect width="7" height="7" x="14" y="3" rx="1"></rect><path d="M10 21V8a1 1 0 0 0-1-1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-5a1 1 0 0 0-1-1H3"></path></svg> <strong>Bundles</strong> menus to add them to your flow.
|
||
Then, configure the component settings and connect the components together.</p>
|
||
<p><img decoding="async" loading="lazy" alt="Chat Input and Output connected to a Language Model component" src="/assets/images/connect-component-d52a14c256f3653e49ce2e2dd311fcef.png" width="3700" height="1880" class="img_ev3q"></p>
|
||
<p>Each component has configuration settings and options. Some of these are common to all components, and some are unique to specific components.</p>
|
||
<p>To form a cohesive flow, you connect components by <em>edges</em> or <em>ports</em>, which have a specific data type they receive or send.
|
||
For example, message ports send text strings between components.</p>
|
||
<p>For more information about component configuration, including port types and underlying component code, see <a href="/concepts-components">Components overview</a>.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="run-a-flow">Run a flow<a href="#run-a-flow" class="hash-link" aria-label="Direct link to Run a flow" title="Direct link to Run a flow"></a></h3>
|
||
<p>After you build a prototype flow, you can test it in the <a href="/concepts-playground"><strong>Playground</strong></a>.
|
||
When you're ready to use Langflow for application development, learn how to <a href="/concepts-publish">trigger flows with the Langflow API</a>, explore more advanced configuration options like <a href="/install-custom-dependencies">custom dependencies</a>, and, eventually, <a href="/develop-application">containerize your Langflow application</a>.</p>
|
||
<p>When you're ready to go to production or deploy a Langflow MCP server for access over the public internet, see <a href="/deployment-overview">Langflow deployment overview</a>.</p>
|
||
<h4 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="flow-graphs">Flow graphs<a href="#flow-graphs" class="hash-link" aria-label="Direct link to Flow graphs" title="Direct link to Flow graphs"></a></h4>
|
||
<p>When a flow runs, Langflow builds a Directed Acyclic Graph (DAG) object from the nodes (components) and edges (connections), and the nodes are sorted to determine the order of execution.</p>
|
||
<p>The graph build calls each component's <code>def_build</code> function to validate and prepare the nodes.
|
||
This graph is then processed in dependency order.
|
||
Each node is built and executed sequentially, with results from each built node being passed to nodes that are dependent on that node's results.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="projects">Manage flows in projects<a href="#projects" class="hash-link" aria-label="Direct link to Manage flows in projects" title="Direct link to Manage flows in projects"></a></h2>
|
||
<p>The <strong>Projects</strong> page is where you arrive when you launch Langflow.
|
||
From here, you can manage flows and your projects' <a href="/mcp-server">MCP servers</a>.</p>
|
||
<p>Langflow projects are like folders that you can use to organize related flows.
|
||
The default project is <strong>Starter Project</strong>, and your flows are stored here unless you create another project.
|
||
To create a project, click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-plus" aria-hidden="true"><path d="M5 12h14"></path><path d="M12 5v14"></path></svg> <strong>Create new project</strong>.</p>
|
||
<p><img decoding="async" loading="lazy" alt="Projects page with multiple flows in a project" src="/assets/images/my-projects-ecb47861c2d88557320b768d0c17b747.png" width="4000" height="2186" class="img_ev3q"></p>
|
||
<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_BuS1"><p>To get back to the <strong>Projects</strong> page after editing a flow, click the project name or Langflow icon in the Langflow header.</p></div></div>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="edit-flow-details">Edit flow details<a href="#edit-flow-details" class="hash-link" aria-label="Direct link to Edit flow details" title="Direct link to Edit flow details"></a></h3>
|
||
<ol>
|
||
<li>On the <strong>Projects</strong> page, locate the flow you want to edit.</li>
|
||
<li>Click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-ellipsis" aria-hidden="true"><circle cx="12" cy="12" r="1"></circle><circle cx="19" cy="12" r="1"></circle><circle cx="5" cy="12" r="1"></circle></svg> <strong>More</strong>, and then select <strong>Edit details</strong>.</li>
|
||
<li>Edit the <strong>Name</strong> and <strong>Description</strong>, and then click <strong>Save</strong>.</li>
|
||
</ol>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="lock-a-flow">Lock a flow<a href="#lock-a-flow" class="hash-link" aria-label="Direct link to Lock a flow" title="Direct link to Lock a flow"></a></h3>
|
||
<p>To prevent changes to a flow, you can lock it:</p>
|
||
<ol>
|
||
<li>On the <strong>Projects</strong> page, locate the flow you want to lock.</li>
|
||
<li>Click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-ellipsis" aria-hidden="true"><circle cx="12" cy="12" r="1"></circle><circle cx="19" cy="12" r="1"></circle><circle cx="5" cy="12" r="1"></circle></svg> <strong>More</strong>, and then select <strong>Edit details</strong>.</li>
|
||
<li>Enable <strong>Lock Flow</strong>, and then click <strong>Save</strong>.</li>
|
||
</ol>
|
||
<p>Repeat these steps to unlock the flow by disabling <strong>Lock Flow</strong>.</p>
|
||
<p>When editing a flow, the <strong>Lock Status</strong> indicates whether the flow is <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lock" aria-hidden="true"><rect width="18" height="11" x="3" y="11" rx="2" ry="2"></rect><path d="M7 11V7a5 5 0 0 1 10 0v4"></path></svg> <strong>Locked</strong> or <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lock-open" aria-hidden="true"><rect width="18" height="11" x="3" y="11" rx="2" ry="2"></rect><path d="M7 11V7a5 5 0 0 1 9.9-1"></path></svg> <strong>Unlocked</strong>.
|
||
You cannot change the lock status while editing the flow.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="move-a-flow">Move a flow<a href="#move-a-flow" class="hash-link" aria-label="Direct link to Move a flow" title="Direct link to Move a flow"></a></h3>
|
||
<p>To move a flow from one project to another, do the following:</p>
|
||
<ol>
|
||
<li>On the <strong>Projects</strong> page, locate the flow you want to move.</li>
|
||
<li>Click and drag the flow from the list of flows to the target project name in the list of projects.</li>
|
||
</ol>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="delete-a-flow">Delete a flow<a href="#delete-a-flow" class="hash-link" aria-label="Direct link to Delete a flow" title="Direct link to Delete a flow"></a></h3>
|
||
<ol>
|
||
<li>On the <strong>Projects</strong> page, locate the flow you want to delete.</li>
|
||
<li>Click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-ellipsis" aria-hidden="true"><circle cx="12" cy="12" r="1"></circle><circle cx="19" cy="12" r="1"></circle><circle cx="5" cy="12" r="1"></circle></svg> <strong>More</strong>, and then select <strong>Delete</strong>.</li>
|
||
</ol>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="flow-storage-and-logs">Flow storage and logs<a href="#flow-storage-and-logs" class="hash-link" aria-label="Direct link to Flow storage and logs" title="Direct link to Flow storage and logs"></a></h2>
|
||
<p>By default, flows and flow execution data are stored in the Langflow database, and flow logs are stored with other Langflow logs in the Langflow config directory.
|
||
For more information, see <a href="/memory">Memory management options</a> and <a href="/logging">Logging</a>.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="see-also">See also<a href="#see-also" class="hash-link" aria-label="Direct link to See also" title="Direct link to See also"></a></h2>
|
||
<ul>
|
||
<li><a href="/concepts-publish">Share and embed flows</a></li>
|
||
<li><a href="/concepts-flows-import">Import and export flows</a></li>
|
||
<li><a href="/environment-variables">Langflow environment variables</a></li>
|
||
</ul></div></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/concepts-overview"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Use the visual editor</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/concepts-publish"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Trigger flows with the Langflow API</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#create-a-flow" class="table-of-contents__link toc-highlight">Create a flow</a><ul><li><a href="#add-components" class="table-of-contents__link toc-highlight">Add components</a></li><li><a href="#run-a-flow" class="table-of-contents__link toc-highlight">Run a flow</a></li></ul></li><li><a href="#projects" class="table-of-contents__link toc-highlight">Manage flows in projects</a><ul><li><a href="#edit-flow-details" class="table-of-contents__link toc-highlight">Edit flow details</a></li><li><a href="#lock-a-flow" class="table-of-contents__link toc-highlight">Lock a flow</a></li><li><a href="#move-a-flow" class="table-of-contents__link toc-highlight">Move a flow</a></li><li><a href="#delete-a-flow" class="table-of-contents__link toc-highlight">Delete a flow</a></li></ul></li><li><a href="#flow-storage-and-logs" class="table-of-contents__link toc-highlight">Flow storage and logs</a></li><li><a href="#see-also" class="table-of-contents__link toc-highlight">See also</a></li></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer"><div class="container container-fluid"><div class="row footer__links"><div class="theme-layout-footer-column col footer__col"><div class="footer__title"></div><ul class="footer__items clean-list"><li class="footer__item"><div class="footer-links">
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