# What Is My Browser

> A fast, secure, modern web tool to detect and display your browser details, version, operating system, IP address, screen resolution, viewport size, device hardware capabilities, and HTTP request headers.

What Is My Browser provides comprehensive client and server-side diagnostics for web developers, IT support, troubleshooters, and curious users. Detection happens dynamically on page load via Angular 22 hybrid rendering (SSR) and client-side device APIs. No personal data or user agents are ever logged or stored.

## Docs

- [Full site content](https://whatismybrowser.app/llms-full.txt): the complete documentation, technical diagnostics, and FAQ about web browsers, user agents, IP addresses, screen resolution, and privacy.
- [Sitemap](https://whatismybrowser.app/sitemap.xml): machine-readable list of site URLs.

## Features

- **Browser Details**: Detects browser family, major and minor versions, rendering engine, and language preferences.
- **Client IP Address**: Shows the visitor's public IPv4/IPv6 address as detected through reverse proxy and server headers.
- **Screen & Viewport**: Measures screen resolution, available screen resolution, inner browser viewport size, and device pixel ratio (Retina/HiDPI).
- **Device & Operating System**: Identifies OS name, version, device vendor, architecture, CPU logical cores, device memory, and touch support.
- **HTTP Request Headers**: Lists all HTTP headers transmitted by your browser during the request.
- **Theme Support**: Seamless automatic light/dark theme switching based on OS preferences with manual toggle.
- **Privacy First**: Zero tracking, zero storage of user agents or IP addresses.