Analizador de User Agent
Analizar cadenas de User Agent para identificar navegador, SO, dispositivo y motor
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Privacy & Trust
Resultados del análisis
Break raw user agent strings into browser, engine, OS, device, and CPU sections instantly.
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Use your current browser string to confirm how the client environment is being identified.
Resultado
Parsing stays in the browser, so logs and pasted headers do not need to leave the page.
Resultados del análisis
Enter a user agent string to generate a parsed snapshot.
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Códigos de Estado HTTP
Referencia rápida de todos los códigos de estado HTTP y sus significados
Cómo Usar
Pega o Escribe
Ingresa tu texto, código o datos en el área de entrada.
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Selecciona la transformación o formato que deseas aplicar.
Copia el Resultado
Copia la salida a tu portapapeles con un solo clic.
Por Qué Usar Esta Herramienta
100% Gratis
Sin costos ocultos, sin niveles premium — todas las funciones son gratuitas.
Sin Instalación
Se ejecuta completamente en tu navegador. No necesitas descargar ni instalar nada.
Privado y Seguro
Tus datos nunca salen de tu dispositivo. Nada se sube a ningún servidor.
Funciona en Móvil
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User Agent Strings: Browser and Device Identification
Key Takeaways
- User agent strings identify the browser, operating system, and device type — but their format is notoriously inconsistent and often misleading.
- User agent parsing is essential for analytics, content negotiation, and debugging browser-specific issues.
- All parsing happens in your browser — your user agent data is never sent to any external server.
Every HTTP request includes a User-Agent header that identifies the client software. What started as a simple browser identifier has evolved into a complex string carrying browser, engine, OS, and device information — with decades of legacy compatibility quirks. Parsing user agents is essential for web analytics, responsive design debugging, and understanding your audience's technology profile.
Chrome's User-Agent string contains 'Mozilla/5.0' and 'Safari' — a legacy of browser compatibility hacks dating back to the 1990s.
Historical Quirk
Key Concepts
User Agent String Components
A typical UA string contains: Mozilla compatibility token, platform/OS info (Windows NT 10.0, Macintosh, Linux), rendering engine (AppleWebKit, Gecko), and browser name/version (Chrome/120, Firefox/121).
User-Agent Client Hints
The new Client Hints API (Sec-CH-UA headers) provides structured, opt-in device information instead of the bloated UA string. It offers browser, platform, and architecture data in clean, parseable format.
Bot and Crawler Detection
Search engine crawlers (Googlebot, Bingbot) and other bots identify themselves via user agent strings. Detecting these helps serve appropriate content and manage server resources.
UA Freezing and Reduction
Chrome is gradually freezing and reducing user agent string information for privacy. Many fields now contain fixed values. Developers should migrate to Client Hints for detailed device information.
Pro Tips
Never rely on user agent strings for security decisions — they can be trivially spoofed by any client.
Use feature detection (Modernizr, CSS @supports) instead of user agent sniffing for browser capability checks.
When analyzing user agents for analytics, use a maintained parsing library rather than custom regex — the format is too inconsistent for manual parsing.
Test your site with various user agents to ensure you are not accidentally blocking legitimate traffic from non-standard clients.
All user agent parsing is performed entirely in your browser. Your user agent string and browsing information are never transmitted to any external server.