Does My Screen Support HDR Checker: Test Your HDR Display
Does My Screen Support HDR Checker. Open this checker to find out does my screen support HDR: HDR Active and Video HDR Active show your live status at once. The scrollbar width checker tool checks your input against current best practices and flags anything worth fixing.
Interactive Tool
HDR Status Right Now
HDR Hardware Check
Enter your monitor specs to estimate its HDR capability and whether your cable can carry a 10-bit HDR signal.
Does my screen support HDR? The HDR Support Checker queries your browser's live dynamic range state and reports whether your session is currently rendering in high dynamic range — not whether your monitor is HDR-capable, but whether HDR is actually switched on right now. A capable display with HDR toggled off in your OS settings will honestly report No here, and the diagnostic list below explains exactly why that happens.
Bought a new screen with a shiny HDR sticker and want to know if it actually delivers? The Does My Screen Support HDR Checker asks your browser whether the display is running in high dynamic range right now, then shows you what that means in plain terms. You get a quick yes or no, plus the context to judge whether your monitor shows a genuinely wider range of luminance or is just an HDR monitor on paper that looks close to standard dynamic range. It works on any device with a modern browser, from a laptop to a living-room TV.
How the Does My Screen Support HDR Checker Tests Your Display
The moment the page loads, the checker runs a set of media queries that every current browser exposes. The key one is dynamic-range: high, which returns true only when your computer or phone is sending an HDR signal to the monitor and the browser can render it. It also reads the colour space the browser reports (sRGB, P3 or Rec. 2020) and the bit depth per pixel. Nothing is uploaded or installed; the browser reports what your PC, Mac or phone already knows about the display.
Take a worked example we use throughout this guide: a 27-inch 4K IPS monitor with a measured 450-nit peak, a 1,100:1 static contrast ratio, 16-zone edge-lit dimming, an 8-bit + FRC panel and 93% DCI-P3 coverage, plugged into a laptop over an older 18 Gbps port. With HDR switched off, the checker reports "HDR: not active". With HDR switched on in Windows, it flips to "active", but the colour depth line drops on this HDR monitor, which is your first clue that the cable is the bottleneck (more on that below).
Reading a Yes, No or Inactive Result
Read the result lines together before deciding whether the screen is HDR-ready:
| Result line | What it tells you | What to do next |
|---|---|---|
| HDR active | The monitor accepts HDR input and your computer is using it | Judge the monitor with the specs below |
| HDR capable, not active | The monitor supports HDR but it is switched off | Turn it on in your display settings |
| No HDR | No HDR path exists between device and monitor | Check the cable, port and spec sheet |
A "yes" only proves basic HDR support: the signal gets through. It does not prove proper HDR support, which depends on hardware the browser cannot measure.
What High Dynamic Range Means on a Monitor
HDR expands the range between the darkest and brightest parts of an image, and widens the colour range in between. Where a standard monitor squeezes a sunlit window and a dim room into one compressed scale, an HDR monitor keeps bright highlights bright while preserving the detail in shadows. The result looks more realistic and lifelike on a capable monitor, with colour that is vibrant rather than oversaturated. HDR compatibility is a chain, though: the monitor, the content, the cable and the device all have to cooperate. The color gamut checker checks your input against current best practices and flags anything worth fixing.
| Term | Meaning | Why it matters for HDR |
|---|---|---|
| Peak brightness | The brightest small area the monitor can hold | Makes highlights pop instead of looking flat |
| Contrast | Gap between the darkest black and the brightest white | Gives the image depth |
| Colour gamut | How many colours the panel can reproduce | Richer, more natural colour |
| Local dimming | Dims parts of the backlight independently | Keeps shadows dark next to bright objects |
| HDR certification | A tested performance tier | Lets you compare HDR quality between models |
The practical brightness range is what separates a convincing picture from a merely brighter one.
How HDR Works: Brightness, Contrast and Metadata
HDR content is mastered on reference displays at very high brightness, and it carries metadata that tells your monitor how bright and how colourful each scene was meant to be. The screen maps that information onto what its own hardware can show. When the monitor has the headroom, sunsets, reflections on water and explosions keep their detail; when the monitor lacks it, the brightest parts clip and shadow detail in dark scenes turns to mush, which is far from realistic. The free display specs report gives you a clear, actionable result instantly, with no sign-up required.
A useful way to compare contrast is to convert it to photographic stops, where each stop doubles the light:
$$\text{stops} = \log_{2}(\text{contrast ratio})$$
Our example monitor's 1,100:1 works out to \(\log_{2}(1100) \approx 10.1\) stops. The DisplayHDR 600 minimum of 8,000:1 is about 13.0 stops, and the 30,000:1 floor for DisplayHDR 1000 is about 14.9 stops. Nearly five extra stops is the difference between HDR that looks dramatic and HDR that looks like SDR with the brightness turned up.
HDR vs SDR on the Same Screen
SDR is the format most web pages, office apps and older video use, and it looks perfectly fine for everyday work. HDR only makes a difference with HDR-supported content, and on a weak HDR monitor it can even look worse than SDR: dull, slightly grey and flat, because the monitor compresses a wide signal into a narrow output.
| Feature | SDR | HDR |
|---|---|---|
| Brightness | Fixed, moderate range | Wide range from deep shadow to vivid peaks |
| Colour | Mostly sRGB | Wider colour range and a wider color gamut |
| Content | Works with everything | Needs HDR content, apps and games |
| Best for | Office work and browsing | Films, gaming and cinematic visuals |
If the checker says HDR is active but desktop windows suddenly look washed out, that is normal on many monitors: SDR content is being remapped inside an HDR container. Adjust the SDR brightness slider rather than switching HDR off for good.
HDR Formats: HDR10, Dolby Vision and HLG
HDR10 is the baseline HDR format that nearly every monitor, console and streaming service supports, and it describes the whole film or game with one set of values. Dolby Vision adds dynamic, scene-by-scene data and is common on TVs but rare on PC monitors. HLG (Hybrid Log-Gamma) was designed for broadcast and needs no extra data at all. On a computer, HDR10 support is what matters most, because computers output HDR10 and most HDR video streaming apps fall back to it.
An HDR standard on the box tells you which signal the monitor accepts, not how well it shows it.
Testing a Docked HDR Monitor with the Checker
I am setting up a 31.5-inch 4K VA monitor for HDR photo edits, and the decision is simple: keep the USB-C dock that came with my laptop, or buy a direct cable. The answer comes quickly. Through the dock, the checker reports "HDR: not available" at 3,840 × 2,160 and 60 Hz, even though the monitor's box says HDR and the same screen passes the HDR support test when plugged straight into a desktop.
So I check the dock's manual. Its DisplayPort output shares the USB-C cable with USB 3 data, which leaves two of the four DisplayPort lanes for video: about 12.96 Gbps of usable data. Then I run the numbers myself rather than guessing:
| Mode through the dock | Pixel data needed | Share of 2 lanes |
|---|---|---|
| 4K 60 Hz, 8-bit | 11.94 Gbps | 92% |
| 4K 60 Hz, 10-bit | 14.93 Gbps | 115% |
| 4K 50 Hz, 10-bit | 12.44 Gbps | 96% |
That explains the result: 8-bit fits, so the picture works, but the 10-bit signal an HDR display needs does not, so the HDR toggle never appears. I flip the dock into its "high resolution" mode, which drops USB to 2.0 speed and frees all four lanes (25.92 Gbps). The 10-bit signal now uses 58% of the link, I enable HDR, and the checker turns to "HDR: active".
The 50 Hz row is the trap I almost fell for. On pixel data alone it fits at 96%, but a real video signal also carries blanking intervals. Using the reduced-blanking timing most monitors use, the 50 Hz signal needs roughly 13.0 Gbps, about 100.3% of the two-lane link, so dropping the refresh rate is not a reliable fix. Pixel-only maths flatters any link that sits within about 5% of its limit.
My judgement: the dock is fine for office use, but for HDR work the number to watch is lane count, not the cable's headline speed. If the checker ever says HDR is not available through a dock, count the lanes before you blame the monitor.
What Makes a Good HDR Monitor
A good HDR monitor needs three things working together: enough brightness for highlights, enough contrast to keep blacks dark next to them, and enough colour to fill the image. The specs of the monitor matter more than the label, and HDR image quality varies hugely between monitors that share the same badge.
Peak Brightness Targets
Peak brightness, measured in nits (or cd/m2), sets how far highlights can rise above everyday white. Reviewers test it on a white patch covering a small share of the screen, so a monitor can hit its peak on a 10% patch and fall well short at a high APL, where most of the image is bright. Our 450-nit example monitor sits just above the entry tier: enough for a visible lift, not enough for highlights that look truly bright.
Local Dimming, FALD and Blooming
Local dimming lets an LCD dim parts of its backlight separately. Full-array local dimming (FALD) places hundreds or thousands of dimming zones directly behind the panel, which is what lets an LCD show deep blacks beside a bright object. Edge-lit designs like our 16-zone example can only dim vertical strips, so a bright subtitle lights up a whole column of the screen. Even FALD shows blooming, a faint halo around small bright objects on a black background, and a weakly dimmed IPS monitor also shows backlight bleed.
Color Depth and Colour Gamut
HDR wants a wider color gamut than sRGB, ideally 90% or more of the cinema P3 space, and enough bit depth to avoid banding in smooth gradients. A native 10-bit panel shows over a billion shades; an 8-bit + FRC panel flickers between neighbouring shades to fake them, which most people cannot tell apart. A wide colour gamut without enough brightness behind it, however, still produces a muted image.
VESA DisplayHDR Certification Tiers
VESA DisplayHDR is the industry-wide certification that puts numbers behind HDR claims. The current compliance test (CTS 1.2) tightened every tier, adding stricter checks for black crush, subtle flicker and test patterns, and requiring tier names to state which version they passed. These are the published minimums for the common tiers:
| Tier | Min. peak brightness (cd/m2) | Min. static contrast ratio | DCI-P3 coverage |
|---|---|---|---|
| DisplayHDR 400 | 400 | 1,300:1 | 90% |
| DisplayHDR 500 | 500 | 7,000:1 | 95% |
| DisplayHDR 600 | 600 | 8,000:1 | 95% |
| DisplayHDR 1000 | 1,000 | 30,000:1 | 95% |
| DisplayHDR 1400 | 1,400 | 50,000:1 | 95% |
| DisplayHDR True Black 400-1400 | 400-1,400 | n/a (near-zero black) | 95% |
DisplayHDR 400 and Fake HDR
DisplayHDR 400 is the entry tier and does not require any zone dimming, so many certified monitors look only slightly different with HDR on. Monitors that accept an HDR10 signal without the hardware to show it are often called fake HDR. Our example is a good warning: its 450-nit peak clears the 400 brightness floor, but its 1,100:1 static contrast misses the 1,300:1 minimum, so it could not earn the tier under CTS 1.2 at all. Treat an HDR badge or an HDR label in a product title as a starting point, never a verdict.
DisplayHDR True Black for OLED
DisplayHDR True Black is a separate track for self-emissive panels, which can switch pixels fully off for true blacks. Per-pixel dimming means no halos, so even True Black 400 can look more dramatic than a brighter LCD.
Samsung TrueBright and Other Labels
Samsung's TrueBright rating factors contrast into perceived brightness, but only Samsung uses it, and no brand label shows whether your screen is receiving HDR right now; the checker does.
Panel Types for HDR Compatible Screens
Two monitors can both accept HDR and look nothing alike, because the panel type of each monitor decides how deep the blacks go and how bright highlights get.
OLED HDR Monitors
OLED panels light each pixel individually, giving effectively infinite contrast and the most convincing HDR viewing experience for dark, cinematic scenes. The trade-offs are lower full-screen brightness than the best LCDs and a risk of burn-in from static elements like taskbars. If deep blacks matter most to you, an OLED monitor is the safest pick, and OLED gaming at night is where the format shines.
IPS, VA and Mini LED Panels
IPS panels offer strong colour accuracy and wide viewing angles but modest native contrast, around 1,000:1, so they depend on zone dimming for good HDR. VA panels start with roughly three times the native contrast but can smear in fast motion. Mini LED backlights put hundreds of small zones behind an IPS or VA panel, which is how an LCD monitor reaches the higher DisplayHDR tiers and gets closer to OLED contrast. For photo work, check colour accuracy alongside brightness.
Why 4K and HDR Are Separate Specs
4K describes resolution, the number of pixels; HDR describes brightness, contrast and colour. A 4K monitor without good HDR is sharp but flat, and a 1440p screen with strong HDR can deliver better picture quality in films. Judge the image quality of each separately.
Why Your Monitor Supports HDR but the Checker Says No
If the box says HDR and the checker disagrees, the problem is almost always in the chain, not the monitor. Check these causes in order:
- HDR is switched off on the computer, so the HDR-capable monitor never receives HDR content
- The monitor's own picture mode or HDR setting in the monitor menu is disabled
- The cable or port cannot carry the signal at your chosen resolution and refresh rate
- The graphics drivers are out of date
- A dock, adapter or KVM switch strips the HDR information
- The browser itself does not support HDR detection (some older builds do not)
If your screen supports HDR on paper, one of these is nearly always the culprit, so fix it and rerun the test.
Cables, Ports and Bandwidth
HDR raises the signal from 8 to 10 bits per channel, which raises the data rate. At 3,840 × 2,160 and 60 Hz, that RGB signal needs about 14.9 Gbps of pixel data, while an HDMI 2.0 link carries about 14.4 Gbps after encoding overhead. That is why our example monitor activates HDR but drops colour depth or switches to 4:2:2 chroma, which softens small text. A DisplayPort 1.4 cable (about 25.9 Gbps of usable data) or HDMI 2.1 (about 42.7 Gbps) handles it comfortably.
Graphics Drivers, Docks and Adapters
Your GPU, or graphics card, must also support HDR output, and USB-C hubs on a desktop or laptop often cap the signal at a lower version than the port itself. Plug the monitor straight into the graphics card's output before blaming the monitor itself, and install the GPU maker's latest driver.
How to Enable HDR on Windows and Mac
Most monitors ship with HDR switched off on the computer side, so the checker reports "not active" until you turn it on.
Switching On Use HDR in Windows 11
- Open Settings > System > Display and select the correct monitor if you have more than one
- Turn on the Use HDR toggle (called Windows HD Color on older builds)
- Expand the toggle to adjust SDR content brightness and run the HDR calibration app
- Check Advanced display settings to confirm the HDR certification Windows reads from the monitor
If HDR mode looks dim afterwards, enable the monitor's own HDR picture preset as well, then rerun calibration.
HDR Options in macOS
On a Mac, open the Apple menu settings, choose Displays and select your external monitor. Recent macOS versions show a High Dynamic Range toggle only when the Mac, the cable and the display all support it; if it is missing, something in the chain does not.
Checking HDR Gaming Support on Your Setup
Before judging HDR in games, confirm the checker reads "HDR: active" at the resolution and refresh rate you play at. HDR in games can transform sunlight, fire, neon and night scenes, but only on a gaming monitor with the brightness to back it up, so check its specs before you rely on HDR gaming visuals. For HDR games on a PS5, Xbox Series X or a gaming PC, look for a high refresh rate, low response time and adaptive sync, plus a 48 Gbps port if you want 4K at 120 Hz from a console. Competitive gaming players often turn HDR off, since a fast refresh rate matters more in shooters than brighter explosions. For story-driven and open-world gaming, a good HDR monitor is one of the most visible upgrades you can make.
Best HDR Monitor for Each Use
- HDR films and streaming: "HDR active" plus a 600-tier rating or better, ideally OLED or Mini LED, for movies
- Console and PC gaming: "HDR active" at your full refresh rate on a 4K gaming HDR monitor with HDMI 2.1
- Creative work: "HDR active" with the P3 gamut reported, on a calibrated IPS or OLED monitor with high colour accuracy and precise color accuracy
- Everyday use and budget buyers: a "capable, not active" result is fine; cheap HDR monitors add little
Most HDR monitors below the 600 tier are best treated as good SDR screens that accept HDR when you want it.
Common Mistakes When Checking HDR Display Support
- Trusting the badge: an HDR display that accepts the signal may still show almost no improvement.
- Ignoring brightness: without a high peak, HDR content on any monitor looks dim and lifeless.
- Testing on the wrong screen: with two monitors, the browser window must sit on the one you are checking, since the result follows the window.
- Forgetting content: HDR does nothing for SDR clips, standard websites or games without an HDR mode.
- Testing through a dock: a negative result through a hub tells you about the hub, not the monitor.
- Skipping OLED or FALD specs: the dimming design tells you more about the HDR monitor than any sticker.
Before you buy, read the product specifications for brightness, dimming zones and gamut coverage, not just the HDR support line.
Is an HDR Computer Monitor Worth Buying
An HDR computer monitor is worth it if you watch HDR films, play HDR-enabled games or edit HDR video, and if you choose a monitor with OLED or full-zone dimming hardware. It is not worth paying extra for a bright sticker on an entry-level panel; a good SDR monitor with better resolution or refresh rate will serve you better for gaming and work alike. Run the checker first to confirm your current setup can send HDR at all, then use the brightness, contrast and certification figures above to decide whether an upgrade would give you a real HDR experience.
Frequently Asked Questions
- What does HDR mean on a monitor?
- HDR stands for high dynamic range. On a monitor it means the screen can show brighter highlights, darker shadows and a wider range of colour than a standard dynamic range (SDR) display, as long as the content and your device also support HDR.
- How can I tell if my monitor supports HDR?
- Check the spec sheet for HDR10 or a VESA DisplayHDR tier, then run this checker with HDR switched on. If the browser reports HDR as active, the whole chain from your computer to the screen supports it; peak brightness, contrast and dimming type tell you how good it will look.
- Why does my HDR monitor look washed out with HDR on?
- Windows remaps normal SDR content inside an HDR signal, which can make the desktop look grey on many monitors. Adjust the SDR content brightness slider and run the HDR calibration app, and enable the monitor's own HDR picture mode.
- Is HDR worth it on a monitor?
- It is worth it on an OLED or full-array local dimming monitor at DisplayHDR 600 or higher, especially for HDR films and games. On an entry-level DisplayHDR 400 screen the difference is small, and SDR can even look cleaner.
- What is the difference between HDR and SDR?
- SDR uses a limited brightness range and mostly the sRGB colour space. HDR uses 10-bit signals, metadata and a wider range of brightness and colour, so highlights stay bright while shadow detail is preserved.
- How do I see my display's HDR certification in Windows?
- Open Settings, choose System, then Display, select your monitor and open Advanced display settings. Windows lists the display's colour space and, on many monitors, its HDR certification there.
- Why won't HDR turn on even though my monitor supports it?
- The usual causes are a cable or port without enough bandwidth, HDR switched off in the monitor menu, outdated graphics drivers, or a dock or adapter that limits the signal. Connect the monitor straight to the graphics card with a DisplayPort 1.4 or HDMI 2.1 cable and try again.