HDR Test

What is HDR? What problems can HDR testing solve?

HDR testing is a tool that detects a monitor's High Dynamic Range (HDR) capabilities online through your browser. Many users ask what is HDR — simply put, HDR (High Dynamic Range) means the screen can simultaneously display deeper blacks and brighter highlights, making images closer to real-world brightness levels. HDR testing reads the monitor's HDR status (color gamut, color depth, resolution) through system APIs, and helps users determine whether their monitor has true HDR hardware through dynamic range testing and wide color gamut verification.

Regarding whether HDR is better on or off, the answer depends on the use case: when watching HDR movies, playing HDR games, or doing professional color grading, turning on HDR provides a better experience; but for daily office work or web browsing, if your monitor's HDR capability is insufficient, the image may appear washed out when enabled, and turning it off is more comfortable. This HDR test tool helps you verify whether your monitor is worth enabling HDR and solves common HDR setup troubleshooting issues.

Unlike other screen testing software that requires installation, this HDR test is entirely based on browser-native rendering and media query APIs — just open the webpage to begin testing. It supports system HDR status reading, 16-level brightness steps, P3 wide color gamut comparison, and more, making it an ideal choice for quickly verifying monitor HDR performance. Combined with the true HDR judgment criteria below, you can intuitively see the actual performance of HDR capabilities.

Why perform HDR testing? How to distinguish true HDR from fake HDR?

Monitor HDR directly affects the visual experience in gaming, movies, and professional content creation. If a monitor claims HDR support but has insufficient brightness, narrow color gamut, or washed-out blacks, it may be due to panel type limitations, outdated backlight technology, or improper system settings. HDR testing can quickly identify these issues, which is the significance of regular screen testing. For HDR setup troubleshooting, this tool provides system-level detection and true HDR standard references to help users pinpoint problems accurately.

True HDR judgment criteria: A true HDR experience requires 600+ nit peak brightness, and the ability to simultaneously display deep blacks (<0.01 nit) and bright highlights in the same image. Many low-end monitors claim HDR support (can receive HDR10 signals) but have peak brightness under 400 nits and contrast ratio of only 1000:1 — unable to truly present HDR effects. VESA DisplayHDR 400 is the lowest certification level, and meaningful HDR experience starts from DisplayHDR 600+.

DisplayHDR level reference: 400 entry-level, 600 usable, 1000 excellent, 1400+ flagship. Panel technology has a decisive impact on HDR performance: OLED / QD-OLED have infinite contrast and perfect blacks, making them the best choice for HDR; Mini LED with high partition count local dimming also delivers excellent HDR, with peak brightness even exceeding OLED; VA panels have relatively high contrast (3000-5000:1), with acceptable HDR effects; IPS (without local dimming) has a contrast ratio of only 1000:1, with severely washed-out blacks, making it almost impossible to present true HDR effects. If you want to know whether HDR is better on or off, first confirming the panel type through HDR testing is the first step.

HDR format introduction: HDR10 is the universal standard with static metadata; HDR10+ and Dolby Vision provide dynamic metadata with better picture quality, with Dolby Vision being the best HDR format currently available but requiring dual support from both display and content; HLG is mainly used for broadcast television. For HDR setup troubleshooting, compatibility with different formats also needs attention.

HDR optimization tips: Enable system HDR (Windows: Settings → Display → Use HDR, ensure HDMI 2.0+/DP 1.4+ connection); use HDR-capable players when playing HDR content (such as VLC 4.0+, MPC-BE+MadVR, Netflix requires Edge+HDCP 2.2); Mini LED monitors can tune local dimming — high for movies, medium for desktop; HDR calibration can use colorimeters supporting PQ curves (Calman/DisplayCAL 6+), but factory presets are usually sufficient. Use included or certified cables, as poor-quality cables may lose HDR signals. HDR dynamic range performance is most noticeable in dark room environments, as ambient light significantly diminishes the advantage of black depth.