About Device Info

Use Device Info to Screen & Browser info. The tool runs in your browser for fast results and keeps your data local.

How to Use

  1. 1. Add your input or data.
  2. 2. Adjust options if needed.
  3. 3. Review the result and copy it.

What is Device Information Detection?

Device information detection uses browser APIs to retrieve details about the user's device, including screen resolution, browser type and version, operating system, user agent string, supported features, and network information. JavaScript provides the navigator object with properties like userAgent, platform, language, and cookieEnabled. Screen information is available via window.screen with width, height, and pixel density. Device detection is used for responsive design, analytics, feature detection, and debugging. Modern approaches use feature detection instead of user agent sniffing for better reliability and forward compatibility.

Common Use Cases

Device information is essential for web development and analytics. Frontend developers implement responsive designs based on screen size and device capabilities. Analytics platforms track device types, browsers, and operating systems for user insights. QA testers verify browser compatibility and debug device-specific issues. Support teams gather device information for troubleshooting user problems. Ad networks optimize ad delivery based on device type and screen size. Progressive Web Apps detect device capabilities for feature enablement. Security systems fingerprint devices for fraud detection and authentication.

  • Responsive design based on screen size
  • Analytics tracking of device types and browsers
  • Browser compatibility testing and debugging
  • Support troubleshooting with device details
  • Ad delivery optimization by device type
  • PWA feature detection and enablement
  • Device fingerprinting for security
  • User experience optimization by capabilities

Best Practices & Tips

Use feature detection instead of user agent sniffing for better reliability. Test responsive designs on actual devices, not just browser emulation. Respect user privacy—disclose device information collection in privacy policies. Use matchMedia for responsive breakpoints instead of screen dimensions. Detect touch support with pointer events, not user agent. Handle missing or blocked APIs gracefully—some users disable JavaScript or use privacy tools. Use device pixel ratio for high-DPI display optimization. Avoid making assumptions based on device type—tablets can have desktop browsers.

  • Use feature detection, not user agent sniffing
  • Test on actual devices, not just emulation
  • Disclose device info collection in privacy policy
  • Use matchMedia for responsive breakpoints
  • Detect touch with pointer events, not user agent
  • Handle blocked APIs gracefully for privacy tools
  • Use device pixel ratio for high-DPI displays
  • Avoid assumptions—tablets can have desktop browsers

Troubleshooting Common Issues

If user agent is spoofed or blocked, use feature detection instead of parsing user agent strings. If screen dimensions are incorrect, check for zoom level and device pixel ratio. If device type detection fails, avoid relying on user agent—use feature detection. If touch detection is wrong, use pointer events API instead of touch events. If browser version is outdated, the user may be on an old device or using privacy tools. If language detection is wrong, provide manual language selection. If capabilities are missing, the user may have disabled JavaScript or use privacy extensions.

  • User agent spoofed or blocked by privacy tools
  • Screen dimensions incorrect due to zoom or DPR
  • Device type detection failing from user agent parsing
  • Touch detection wrong without pointer events API
  • Browser version appearing outdated or generic
  • Language detection incorrect for user preference
  • Capabilities missing from disabled JavaScript
  • Privacy extensions blocking device information

Frequently Asked Questions

Is Device Info free to use?

Yes. Device Info is free and works directly in your browser.

Does Device Info upload my data?

No. Most processing happens locally. Any network requests are clearly indicated.

What formats does Device Info support?

Device Info supports the common formats described on the page. Convert uncommon formats before pasting.

How should I share results from Device Info?

Copy the output and review any sensitive data before sharing or publishing.