UAParser.js - The Essential Web Development Tool for User-Agent Detection. Detect Browsers, OS, Devices, Bots, Apps, AI Crawlers, and more. Run in Browser (client-side) or Node.js (server-side).

Yet Another UserAgent Analyzer

PHP library to manipulate and generate responsive images

💻 A random user-agent generator.

Extracts browser and operating system information from the user agent string or user agent object(userAgentData).

An intuitive Remix + Client Hints example, that provides Theme Switching & Server Dates in your application.

A NextJS demo about client hints and user preferences

Seamlessly get authentic and ready-to-use browser headers with ease.

UAClientHints.js - Parse & serialize user-agent client hints (UA-CH) HTTP headers

Generate statistically accurate User Agents and Client Hints (Sec-CH-UA). Deterministic, data-driven browser identities based on real-world market share distributions.

51Degrees UAParser provides comprehensive device data based on User-Agent Client Hints and/or the User-Agent. The package can be used both in the browser and Node.js environment.

Coherent user-agent and browser fingerprint spoofing for Chromium-based browsers, with Client Hints, WebGL masking, locale/timezone alignment, and per-site control.

High-performance, zero-allocation HTTP User-Agent parser for Go — browser, OS, device, bot & AI crawler detection with Client Hints support

Conversion routines between Structured User Agent and User Agent Client Hints

React User Agent Client Hints Hooks, Component, and Provider. SSR-ready and fully unit-tested.

An extension that replaces the User Agent and etc.

Unreduced, freeze-free version of your user-agent

📱 user-agent string parser

Go package for Client-Hint parser

Adaptive Loading Microsite: A comprehensive showcase of adaptive loading strategies for modern web applications. Features 24+ demos, React hooks library, and techniques for network-aware, memory-considerate, and battery-aware loading based on user device capabilities.