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The JavaScript Diagram is a feature-rich architecture diagram library for visualizing, creating, and editing interactive diagrams. It supports creating flowcharts, organizational charts, mind maps, and BPMN charts either through code or a visual interface.

Why choose Syncfusion JavaScript Diagram?

JavaScript diagram automatic layout

Automatic layout

Automatically arrange nodes based on a predefined layout algorithm.

JavaScript diagram data binding

Seamless data binding

Populate diagrams with nodes and connectors created and positioned based on data from data sources. Without having to write any code, easily convert, map, and consume data in any format in the diagram by setting a few properties.

JavaScript diagram interactive editing

Interactive editing

The JavaScript Diagram lets you pan and zoom, snap, undo and redo, stencil, resize, and rotate interactively.

JavaScript diagram adapts to any resolution

Adapts to any resolution

Diagram has a highly responsive layout and an optimized design for desktops, touchscreens, and phones. It works well on all mobile phones that use iOS, Android, or Windows OS.

JavaScript diagram reusable symbols

The SymbolPalette displays a collection of palettes. A palette displays a set of nodes and connectors that you can drag and drop into the diagram.

JavaScript diagram template shapes

Create your own template shapes

Visualize any graphical object using nodes that can be arranged and manipulated on a diagram page at the same time. Diagram allows you to add different kinds of nodes.

JavaScript diagram customizable themes

Attractive, customizable themes

Cutting-edge design with several built-in themes, such as Fluent, Tailwind CSS, Bootstrap, Material, and Fabric. Utilize the online Theme Studio tool to customize themes of diagram easily.

JavaScript diagram globalization and localization

Globalization and localization

Enable users from different locales to use the component by formatting dates, currency, and numbering to suit preferences.

JavaScript Diagram Code Example

Easily get started with the JavaScript Diagram using a few simple lines of HTML and TS code example as demonstrated below. Also explore our JavaScript Diagram Example that shows you how to render and configure a Diagram in JavaScript.

<div class="control-section">
    <div class="content-wrapper">
        <div id="element">
import { Diagram } from '@syncfusion/ej2-diagrams';

let diagram: Diagram = new Diagram({
width: '100%', height: '600px'


The JavaScript Diagram library provides all the standard flowchart shapes as ready-made objects to build flowcharts, making it is easy to add them to a diagram surface in a single call.

Flowchart diagram created with built-in flowchart shapes available in JavaScript Diagram library

Organizational chart visualization using data binding and automatic layout features in JavaScript Diagram library

Organizational chart

Arrange the parent and child node positions automatically with a built-in, automatic layout algorithm specifically made for organizational charts.

Mind map

The automatic layout algorithm is also built for mind map diagrams. You can define which node should be at the center and which nodes should be placed around the center node in the diagram surface.

Mind map diagram created with data binding and automatic layout features available in JavaScript Diagram library


Visualize any graphical object using nodes, which can be arranged and manipulated at the same time on a diagram page. They allow the following:

  • Use many predefined standard shapes.
  • Create and add custom shapes easily.
  • Fully customize the appearance of a node.
  • Design a node UI template and reuse it across multiple nodes.


A connector represents a relationship between two nodes.

Different types of connectors available in JavaScript Diagram library


The JavaScript Diagram with rich UI provides straight, orthogonal, polyline, and curved connector types. You can choose any of these based on the type of diagram or relationship between the connected nodes.

Connector line jump behavior in JavaScript Diagram library

Bridging or line jumps

Use bridging (line jumps) to illustrate a connector’s route, making it easy to read where connectors overlap each other in a dense diagram.

Predefined arrowheads in JavaScript Diagram library illustrate flow direction in the diagram


Use different types of predefined arrowheads to illustrate flow direction in flowchart diagrams. You can also build your own custom arrowheads.

Connector appearance customization in JavaScript Diagram library


Like nodes, the connector look and feel can also be customized any way you want. The JavaScript Diagram control provides a rich set of properties through which you can customize connector color, thickness, dash and dot appearance, corners, and even decorators.

Ports (connection points)

Attach connectors to specific places on a node through different types of ports or connecting points.

Connect to specific places on a node using ports in the JavaScript Diagram library


Additional information can be shown by adding text or labels on nodes and connectors.

Additional information can be shown on nodes and connectors using labels in JavaScript Diagram library


You can add and edit text at runtime and mark it read-only if it should not be edited.

Add multiple labels on nodes and connectors using Label feature in JavaScript Diagram Library

Multiple labels

Add any number of labels and align them individually.

Align labels inside or outside a node in JavaScript Diagram library


Labels include sophisticated alignment options: Place inside or outside a node, or at the source or target end of a connector. Automatically align when a node or connector moves.

Interactive features

Use interactive features to improve the editing experience of a diagram at runtime. Furthermore, you can easily edit a diagram with mouse, touchscreen, or keyboard interfaces.

Select and drag the nodes or connectors using handlers in JavaScript Diagram library

Select and drag

Select one or more nodes, connectors, or annotations and edit them using thumbs or handlers.

Select and resize nodes using handlers in JavaScript Diagram library


You can resize a node in eight different directions and lock a node’s aspect ratios to keep its shape. You can also resize multiple objects at the same time.

Select and rotate nodes using handlers in JavaScript Diagram library


Rotate selected nodes from 0 to 360 degrees.

Undo and redo the recent changes using history manager feature in JavaScript Diagram library

Undo and redo

Don’t worry when you edit by mistake undo and redo commands help to easily correct recent changes.

Cut, copy, and paste selected objects within a diagram using the clipboard feature in JavaScript Diagram library


Cut, copy, paste, or duplicate selected objects within and across diagrams.

Move objects to the top or bottom of the diagram using the z-order feature in JavaScript Diagram library


When multiple objects overlap, the z-order controls which object is at the top and which is at the bottom.

Align nodes and connectors with the nearest gridlines or objects in JS Diagram library


Precisely align nodes, connectors, and annotations while dragging just by snapping to the nearest gridlines or objects.

Combine multiple nodes into a group node in JS Diagram library


You can combine multiple nodes into a group and then interact with them as a single object. Nested groups are also possible with our JavaScript Diagram control.

Quick commands can be shown as buttons near a selector in JavaScript Diagram library

Quick commands

Frequently used commands like delete, connect, and duplicate can be shown as buttons near a selector. This makes it easy for users to perform those operations quickly instead of searching for the correct buttons in a toolbox.


Our JavaScript Diagram Library has predefined alignment commands that enable you to align the selected objects’ nodes and connectors with respect to the selection boundary.

Arrange selected objects in equal intervals using spacing commands in JavaScript Diagram library

Spacing commands

Spacing commands enable you to place selected objects on the diagram at equal intervals from each other.

Resize selected objects to have equal sizes in JavaScript Diagram library

Sizing commands

Use sizing commands to equally size selected nodes with respect to the first selected object.

Align selected objects horizontally or vertically by using align commands in JavaScript Diagram library

Align commands

All the nodes or connectors in the selection list can be aligned at the left, right, or center horizontally, or aligned at the top, bottom, or middle vertically with respect to the selection boundary.

Automatic layout

Arrange nodes automatically based on a predefined layout algorithm. Features a built-in hierarchical tree, radial tree, and symmetric layouts.

Measure the distance of nodes from the page origin by using the ruler feature in JavaScript Diagram library


Rulers allow you to measure the distance of nodes or connectors from the origin of the page. This is especially useful in creating scale models.

Symbol palette

The JS Diagram control includes a gallery of stencils, reusable symbols, and nodes that can be dragged onto the surface of a diagram.

Host reusable nodes inside the symbol palette using the symbol palette feature in JavaScript Diagram library

Improve the navigation experience with larger diagrams by using the overview panel in JavaScript Diagram library

Overview panel

The overview panel allows you to improve the navigation experience when exploring large diagrams. It displays a small preview of the full diagram page that allows users to zoom and pan within it.

Drawing tools

Draw all kinds of built-in nodes and connect them with connectors interactively by just clicking and dragging on the drawing area.

Draw nodes and connectors interactively using JavaScript Diagram library

View a large diagram closely or farther away by zooming in and out in JavaScript Diagram library

Zoom and pan tools

View a large diagram closely or assume a wider view by zooming in and out. Also, navigate from one region of a diagram to another by panning across the diagram.


You can export a diagram to different image files such as PNG, JPEG, BMP, and SVG.

Export the diagram to different image formats using JavaScript Diagram library

Print diagrams from the browser using JavaScript Diagram library


Print diagrams from the browser. You can also customize the page size, orientation, and page margin, and fit a diagram to a single page.


Save the state of your JavaScript Diagram in JSON format and load it back later for further editing using the serializer.

Save and load a diagram by serializing it to JSON format using JavaScript Diagram library


In addition to all the features listed so far, there are many more that enhance the diagramming experience.

Align objects using gridlines in JavaScript Diagram library


Gridlines provide guidance when trying to align objects in Diagram.

Define page-like appearance on the drawing surface using JavaScript Diagram library

Page layout

Give a page-like appearance to the drawing surface using page size, orientation, and margins.

Additional information about a node can be viewed by using tooltips in JavaScript Diagram library


Use tooltips to provide additional information about a node.

Use context menu feature to map frequently used commands in JavaScript Diagram library

Context menu

Easily map frequently used commands to the context menu.

Additional features

Keyboard navigation in JavaScript Diagram

Keyboard navigation

The JavaScript Diagram control ensures that every cell is accessible using the keyboard. Major features like sort, select, and edit can be performed using keyboard commands alone; no mouse interaction is required. This helps in creating highly accessible applications using this control.

JavaScript Diagram developer-friendly APIs

Developer-friendly APIs

Developers can have full control over the UI and behavior of the event calendar through its built-in, developer-friendly APIs. It allows you to customize even the complex Diagram functionalities with ease.

Other supported frameworks

The Diagram component is also available in Blazor, Angular, React, and Vue frameworks. Check out the different Diagram platforms from the links below,

Supported browsers

The JavaScript Diagram works well with all modern web browsers such as Chrome, Firefox, Microsoft Edge, Safari, and Opera.

Supported browsers of JavaScript


Frequently Asked Questions

The JavaScript Diagram with rich set of features offers the following:

You can find our JavaScript Diagram demo, which demonstrates how to render and configure Diagram.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

A good place to start would be our comprehensive getting started documentation.

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