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AR.js Review

AR.js is a lightweight JavaScript library designed for augmented reality experiences directly within web browsers, supporting image, location-based, and marker tracking.

shipped Sep 17, 2026free

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Why it matters

1AR.js is an open-source JavaScript library for web-based augmented reality.

2It supports image tracking, location-based AR, and marker tracking.

3The library is optimized for performance, running efficiently at 60 frames per second on mobile devices.

4AR.js 3.4.7 requires A-Frame 1.6.0 for integration.

Specs

API Docs

View Documentation →

GitHub

View Repository →

API Available

Yes, public API

overview

What is AR.js?

AR.js is a JavaScript library tool developed by AR-js-org that enables web developers to create augmented reality experiences directly within web browsers. It eliminates the need for app downloads and leverages existing web technologies like Three.js, A-Frame, and WebRTC. AR.js supports various tracking methods, including image tracking, location-based AR, and marker tracking, and is optimized for performance on mobile devices.

features

Key Features of AR.js

AR.js provides a comprehensive set of features for developing web-based augmented reality applications, focusing on accessibility and performance across various devices.

Image Tracking: Overlays digital content on or near detected 2D images.
Location-based AR: Displays AR content based on the user's real-world geographical position.
Marker Tracking: Utilizes predefined markers (pattern or barcode) for stable content overlay.
Optimized for mobile devices: Designed for efficient performance, running at 60 frames per second.
Integration with A-Frame: Seamlessly integrates with A-Frame for declarative 3D scene rendering.
Integration with Three.js: Compatible with Three.js for advanced 3D graphics and animations.
Supports diverse content: Renders 2D images, GIFs, 3D models (animated), and 2D video content.
Pure web solution: Operates entirely within web browsers, requiring no external installations.
JavaScript-based: Built on JavaScript, making it accessible to web developers.
Barcode Marker Support: Includes support for AR_MATRIX_CODE_5x5_BCH_22_12_5, AR_MATRIX_CODE_5x5_BCH_22_7_7, AR_MATRIX_CODE_5x5, and AR_MATRIX_CODE_6x6.

use cases

Who Should Use AR.js?

AR.js is suitable for developers and organizations looking to implement augmented reality experiences directly through web browsers, avoiding the complexities and costs associated with native mobile application development. Its open-source nature and performance optimizations make it ideal for a range of interactive and educational applications.

Web Developers: For creating interactive business cards, educational flashcards, or simple augmented print advertisements using HTML and JavaScript.
Educators and Content Creators: To develop augmented books, interactive learning materials, and biology or history learning games.
Marketing and Advertising Agencies: For augmented flyers, advertising campaigns, and interactive product showcases.
Tourism and Cultural Institutions: To build interactive tourist guides, assistance for exploring new cities, and situated art experiences bound to specific real-world coordinates.
Gaming and Entertainment: For creating treasure hunts and location-based interactive games.

how to use

How to Use AR.js

Getting started with AR.js typically involves including the library in an HTML file and configuring the AR scene using A-Frame or Three.js. The process is designed to be straightforward for web developers.

1Include AR.js: Add the AR.js library script to your HTML file, often alongside A-Frame or Three.js.
2Set up Camera: Configure the user's device camera for AR input using WebRTC.
3Define AR Scene: Create an A-Frame scene or Three.js renderer to host your 3D content.
4Implement Tracking: Choose and configure a tracking method (image, marker, or location-based AR) using AR.js components.
5Place Content: Position 2D images, GIFs, 3D models, or videos within the AR scene based on tracking data.
6Test on Device: Deploy and test the web AR experience on a mobile device with WebGL and WebRTC support.

pricing

AR.js Pricing & Plans

AR.js is an open-source project, making it entirely free to use for all developers and organizations. There are no licensing fees, subscription costs, or usage-based charges associated with its core functionalities.

Open Source: Free

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Pros

+Completely open-source and free of charge, making it highly accessible.
+Lightweight and fast, running efficiently at 60 frames per second even on older smartphones.
+Pure web solution, eliminating the need for app downloads or installations.
+Supports multiple AR tracking methods: image, marker, and location-based AR.
+Integrates seamlessly with popular web 3D libraries like A-Frame and Three.js.
+Active community and substantial documentation repository for support.

Cons

−May have fewer advanced features compared to more comprehensive WebXR tools.
−Location-based AR may not work correctly on Firefox due to issues with obtaining absolute device orientation.
−Some users reported issues with glb/gltf format and animations several years ago, though recent updates address some compatibility.
−While continuously developed, some specific features might be less frequently maintained than dedicated projects (e.g., LocAR.js for location-based AR).

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AR.js vs Competitors

AR.js occupies a distinct niche in the WebAR ecosystem, primarily due to its open-source nature, performance, and specific focus on marker-based and location-based AR. It differentiates itself from native browser APIs and other libraries through its ease of use and broad compatibility.

WebXR Device API↗

The WebXR Device API is the native browser API for immersive experiences, offering direct access to AR/VR hardware capabilities without external libraries.

Directly using the WebXR Device API provides maximum control and no external dependencies, but requires more boilerplate code and a deeper understanding of browser APIs compared to the higher-level abstractions offered by AR.js.

JSARToolKit5↗

JSARToolKit5 is a direct JavaScript port of the original ARToolKit, providing robust marker-based tracking capabilities for web browsers.

JSARToolKit5 offers a very stable and mature marker-based tracking solution, but it might feel less modern and have a steeper learning curve compared to the more user-friendly API and broader feature set (like location-based AR) of AR.js.

See every AR.js alternative, compared→

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GitHubgithub.com/ar-js-org