FlowDrop™

Build beautiful workflow editors in minutes, not months.

An awesome workflow editor built with Svelte 5 and @xyflow/svelte.
You own the backend. You own the data. You own the orchestration.

Quickstart • Features • Integration • Docs

Build AI-powered workflows with drag-and-drop simplicity. Connect nodes, configure inputs/outputs, and visualize your entire pipeline.

Why FlowDrop?

Most workflow tools are SaaS platforms that lock you in. Your data lives on their servers. Your execution logic runs in their cloud. You pay per workflow, per user, per run.

FlowDrop is different.

FlowDrop is a pure visual editor. You implement the backend. You control the orchestration. Your workflows run on your infrastructure, with your security policies, at your scale.

No vendor lock-in. No data leaving your walls. No surprise bills.

npm install @flowdrop/flowdrop

Note: FlowDrop supports one editor instance per page (module-level singleton stores). See Architecture Notes for details.

You get a production-ready workflow UI. You keep full control of everything else.

Quickstart

<script lang="ts">
  import { WorkflowEditor } from "@flowdrop/flowdrop";
  import "@flowdrop/flowdrop/styles/base.css";
</script>

<WorkflowEditor />

5 lines. One fully-functional workflow editor.

Features

Visual Editor Only	Pure UI component. No hidden backend, no external dependencies
You Own Everything	Your data, your servers, your orchestration logic, your security policies
Backend Agnostic	Connect to any API: Drupal, Laravel, Express, FastAPI, or your own
8 Built-in Node Types	From simple icons to complex gateway logic
Framework Flexible	Use as Svelte component or mount into React, Vue, Angular, or vanilla JS
Deploy Anywhere	Runtime config means build once, deploy everywhere

Architecture Notes

• Single instance per page. FlowDrop uses module-level singleton stores for state management. Only one FlowDrop editor instance can exist on a page at a time.
• Svelte 5 required. FlowDrop uses Svelte 5 runes ($state, $derived, $effect) throughout. Svelte 4 is not supported.
• Modern browsers only. The library targets ES2020+ and does not include polyfills for older browsers.

Node Types

FlowDrop ships with 8 beautifully designed node types:

Type	Purpose
default	Full-featured nodes with inputs/outputs
simple	Compact, space-efficient layout
square	Icon-only minimal design
tool	AI agent tool nodes
gateway	Conditional branching logic
terminal	Start/end workflow points
note	Markdown documentation blocks
idea	Conceptual BPMN-like flow nodes

From simple triggers to complex branching logic, each node type is designed for specific workflow patterns.

Themes

FlowDrop includes a theme system with built-in light/dark support:

<script lang="ts">
  import { WorkflowEditor } from "@flowdrop/flowdrop";
  import "@flowdrop/flowdrop/styles";
</script>

<!-- Built-in themes: 'default' or 'minimal' -->
<WorkflowEditor theme="minimal" />

Themes bundle a visual skin (CSS token palette) with behavioral UI defaults. You can also pass a custom theme object with your own skin tokens for full control over the light and dark palettes.

// Via the mount API
const app = await mountFlowDropApp(container, {
  theme: "minimal",
  // or a custom theme object:
  // theme: { name: 'minimal', skin: { tokens: { primary: '#e11d48' } } }
});

Sub-Module Exports

FlowDrop provides tree-shakeable sub-module exports so you can import only what you need:

Export Path	Contents
@flowdrop/flowdrop	Full library (components, stores, services, types)
@flowdrop/flowdrop/core	Types and utilities only (no heavy dependencies)
@flowdrop/flowdrop/editor	WorkflowEditor, stores, services
@flowdrop/flowdrop/form	SchemaForm, form fields, registry
@flowdrop/flowdrop/form/code	Code editor field (CodeMirror)
@flowdrop/flowdrop/form/markdown	Markdown editor field
@flowdrop/flowdrop/display	MarkdownDisplay component
@flowdrop/flowdrop/playground	Playground components and services
@flowdrop/flowdrop/settings	SettingsPanel, stores, services
@flowdrop/flowdrop/styles	Base CSS stylesheet
@flowdrop/flowdrop/schema	Workflow JSON schema

Integration

Svelte (Native)

<script>
  import { WorkflowEditor, NodeSidebar } from "@flowdrop/flowdrop";
</script>

<div class="flex h-screen">
  <NodeSidebar {nodes} />
  <WorkflowEditor {nodes} />
</div>

Vanilla JS / React / Vue / Angular

import { mountFlowDropApp, createEndpointConfig } from "@flowdrop/flowdrop";

const app = await mountFlowDropApp(document.getElementById("editor"), {
  workflow: myWorkflow,
  endpointConfig: createEndpointConfig("/api/flowdrop"),
  eventHandlers: {
    onDirtyStateChange: (isDirty) => console.log("Unsaved changes:", isDirty),
    onAfterSave: (workflow) => console.log("Saved!", workflow),
  },
});

// Full control over the editor
app.save();
app.getWorkflow();
app.destroy();

Enterprise Integration

import { mountFlowDropApp, CallbackAuthProvider } from "@flowdrop/flowdrop";

const app = await mountFlowDropApp(container, {
  // Dynamic token refresh
  authProvider: new CallbackAuthProvider({
    getToken: () => authService.getAccessToken(),
    onUnauthorized: () => authService.refreshToken(),
  }),

  // Lifecycle hooks
  eventHandlers: {
    onBeforeUnmount: (workflow, isDirty) => {
      if (isDirty) saveDraft(workflow);
    },
  },

  // Auto-save, toasts, and more
  features: {
    autoSaveDraft: true,
    autoSaveDraftInterval: 30000,
  },
});

API Configuration

Connect to any backend in seconds:

import { createEndpointConfig } from "@flowdrop/flowdrop";

const config = createEndpointConfig("https://api.example.com", {
  endpoints: {
    nodes: { list: "/nodes", get: "/nodes/{id}" },
    workflows: {
      list: "/workflows",
      get: "/workflows/{id}",
      create: "/workflows",
      update: "/workflows/{id}",
      execute: "/workflows/{id}/execute",
    },
  },
});

Customization

The recommended way to customize FlowDrop's appearance is through the theme system. For fine-grained control, you can also override individual CSS custom properties:

:root {
  --fd-background: #0a0a0a;
  --fd-primary: #6366f1;
  --fd-border: #27272a;
  --fd-foreground: #fafafa;
}

Deploy

Docker (Recommended)

cd ../../apps/example-client-docker
cp env.example .env
docker-compose up -d

Node.js

npm run build
FLOWDROP_API_BASE_URL=http://your-backend/api node build

Runtime configuration means you build once and deploy to staging, production, or anywhere else with just environment variables.

Documentation

Resource	Description
QUICK_START.md	Get running in 5 minutes
API Documentation	REST API specification
CHANGELOG.md	Version history

Development

pnpm install         # Install dependencies
pnpm dev             # Start dev server
pnpm build           # Build library
pnpm test            # Run all tests
pnpm storybook       # Launch Storybook

Contributing

FlowDrop is stabilizing. Contributions will open soon. Star the repo to stay updated.

FlowDrop - The visual workflow editor you own completely

Built with ❤️ Svelte 5 and @xyflow/svelte