Accuracy Note: This tool provides browser-based diagnostics. Hardware details like HDMI/HDCP versions are **not directly detectable**. Console/OS guesses are based on heuristics. For precise hardware analysis, use dedicated tools.
Core Display Info
Refresh Rate Estimation
Based on browser `requestAnimationFrame` cycles. Best reflects display rate if browser animations are smooth.
Operating System & Platform
UA-based, not definitive.
Hardware (Browser View)
Test for Widevine DM+HDCP-required policy.
WebGL Extensions
Audio & Video
Click to enumerate.
Click to test.
Click to test.
Click to test.
Network Status
Basic Download "Speed Test"
Very basic client-side test downloading a temporary file from a public CDN. Results highly indicative, not a replacement for dedicated speed tests.
Core Browser Info
Set Languages here...
Client-Side Performance Insight
Metrics from `window.performance` API. Timings relative to this page's `navigationStart`.
Advanced Browser APIs Support
Font Access API (Local Fonts)
Experimental API. Behavior and permissions vary by browser.
HDMI Hardware Limitations (Browser Perspective)
Browsers (JavaScript) cannot access low-level hardware link information like the specific HDMI protocol version (e.g., 1.4, 2.0b, 2.1) negotiated between your devices. This is managed at the OS/driver and physical hardware level.
The physical characteristics of an HDMI cable, including its certified bandwidth (e.g., 18Gbps for Premium High Speed, 48Gbps for Ultra High Speed), cannot be determined or tested by website code.
While a hint for browser-based DRM capabilities is provided elsewhere, the precise HDCP version (e.g., HDCP 1.4, 2.2, 2.3) active on the physical HDMI connection is not exposed to web browsers for security reasons.