markerjs2

marker.js 2 — Add image annotation to your web apps

⚠️ Deprecation notice ⚠️

marker.js 3 is out now. This means that while marker.js 2 will be supported for some time, all future development will be focused on version 3 and beyond. Get the most current version information on markerjs.com

marker.js 2 is a JavaScript browser library to enable image annotation in your web applications. Add marker.js 2 to your web app and instantly enable users to annotate and mark up images. You can save, share or otherwise process the results.

For a more detailed "Getting started" and other docs and tutorials, please refer to the official documentation.

Installation

npm install markerjs2

or

yarn add markerjs2

Usage

To add image annotation to your web application follow these 3 easy steps:

• Create an instance of markerjs2.MarkerArea by passing a target image reference to the constructor.
• Set an event handler for render event.
• Call the show() method.

Here's a simple example:

// skip this line if you are importing markerjs2 into the global space via the script tag
import * as markerjs2 from 'markerjs2';

// create an instance of MarkerArea and pass the target image reference as a parameter
let markerArea = new markerjs2.MarkerArea(document.getElementById('myimg'));

// register an event listener for when user clicks OK/save in the marker.js UI
markerArea.addEventListener('render', (event) => {
  // we are setting the markup result to replace our original image on the page
  // but you can set a different image or upload it to your server
  document.getElementById('myimg').src = event.dataUrl;
});

// finally, call the show() method and marker.js UI opens
markerArea.show();

Demos

Check out marker.js 2 demos for various usage examples.

More docs and tutorials

For a more detailed "Getting started" and other docs and tutorials, please refer to the official documentation.

Credits

marker.js 2 is using icons from Material Design Icons for its toolbar.

License

Linkware (see LICENSE for details) - the UI displays a small link back to the marker.js 2 website which should be retained.

Alternative licenses are available through the marker.js 2 website.

Changelog

[2.32.7] - 2025-09-28

Fixed

• runtime error in certain marker creation flows