Densidad de Píxeles (PPI)Resolución
What is screen PPI (Pixels Per Inch)?
The geometric concentration of physical pixels packed within one linear display inch. High PPI (>150 PPI) renders razor-sharp fonts without jagged artifacts.
HARDWARE & PERIPHERAL DIAGNOSTICS
Screen Information & Monitor Array Detection
Detects native resolution, refresh rate (Hz), DPI density, multi-monitor topology and HDR color capabilities.
SCREEN INFOPartial data
Screen Information
Resolution, Hz, DPI and connected monitors.
Want info about another connected monitor?
This tool reads data from the browser's active screen. To see info about another monitor you must have it connected in extended mode — not mirror.
OVERVIEW
Monitors0
ModeSingle
Global DPR—
PRIMARY DISPLAY
—
—
COMBINED AREA
0 × 0
0.00 MP total
BROWSER
—
GRAPHICS CARD
Not exposed
SPATIAL LAYOUT
Click a tile for technical metrics
Select a display from the layout
Select a display from the layout
Tap any of the numbered rectangles to see all its technical metrics.
Display & Architecture
What is Screen Detection & How Does It Work?
1
Window Management API & Topology
Uses the modern Window Management API to identify every connected physical display, exact desktop coordinates (X, Y), and orientation.
2
Real Refresh Rate (Hz) & DPI
Measures real refresh rate using `requestAnimationFrame` delta sampling and calculates Device Pixel Ratio (DPR) for high-density Retina, 2K and 4K displays.
3
Color Depth & HDR Gamut
Inspects color gamut profiles (sRGB, Display P3, Rec. 2020), High Dynamic Range (HDR) support, and GPU color bit depth.
Quick Usage Guide
- Haz clic en "Detectar Pantalla / Monitores" y acepta el permiso del navegador si tienes múltiples pantallas conectadas.
- Selecciona cualquiera de las tarjetas de pantalla en el mapa visual para inspeccionar su ancho de banda, resolución nativa y densidad.
- Usa la función de destello o cambio de pantalla para verificar en qué monitor físico está situada la ventana de tu navegador.
Diagnostics & Troubleshooting
Common Screen & Multi-Monitor Issues & Fixes
Fix secondary monitor not detected, 60 Hz lock, fuzzy text scaling, and mirrored display topology.
⚡
Issue 1: Second monitor not detected (Black screen / No Signal)
⚡ Quick User Solution
Press `Win + P` and select 'Extend'. If screen remains black, restart your graphics driver instantly with `Win + Ctrl + Shift + B`.
🔧 Advanced Technical Fix
In NVIDIA/AMD Control Panel > Set up multiple displays, enable the undetected display and force EDID detection. Ensure your USB-C port supports DisplayPort Alternate Mode (DP Alt Mode).
⏱️
Issue 2: Display locked at 60 Hz instead of 144 Hz / 240 Hz
⚡ Quick User Solution
Go to Windows Settings > System > Display > Advanced display settings. In 'Choose a refresh rate', change 60 Hz to 144 Hz or your panel's maximum rating.
🔧 Advanced Technical Fix
Many monitors limit HDMI ports to 60/120 Hz under older HDMI specs. Switch to a certified DisplayPort 1.4 or HDMI 2.1 cable, and enable 'DP 1.4 / Overclocking' in the monitor physical OSD menu.
🔍
Issue 3: Blurry text or scaling glitch across mixed-DPI screens
⚡ Quick User Solution
Align scaling factors: Windows resamples bitmaps when moving between 150% (4K) and 100% (1080p) panels. Relaunching the app on the target monitor refreshes crisp DPI rendering.
🔧 Advanced Technical Fix
Right-click the app shortcut > Properties > Compatibility > Change high DPI settings > check 'Override high DPI scaling behavior' and set scaling performed by 'System (Enhanced)' or 'Application'.
🪞
Issue 4: Displays mirror each other and cannot extend
⚡ Quick User Solution
Press `Win + P` and choose 'Extend'. In macOS go to System Settings > Displays > select the external monitor and change from 'Mirror' to 'Extended Display'.
🔧 Advanced Technical Fix
Cheap passive HDMI splitters duplicate the same physical stream. Connect each monitor directly to separate GPU ports or use a DisplayPort MST (Multi-Stream Transport) certified dock.
Trivia & Digital Optics
Did You Know? Screen & Display Facts
Device Pixel Ratio & The Retina Revolution
Until 2010, one CSS pixel mapped 1:1 to a physical screen pixel. High-DPI screens revolutionized rendering: a single logical CSS point now utilizes 4 (DPR = 2) or 9 physical subpixels (DPR = 3) for razor-sharp typography.
Why 60 Hz and Not 70 Hz or 100 Hz?
The 60 Hz standard originated in early CRT televisions, where electron beam sweeps synchronized with the 60 Hz AC power grid in North America to prevent hum bars and visual electrical ripple.
8-Bit (16.7M) vs 10-Bit (1.07 Billion Colors)
Standard 8-bit displays produce 256 shades per RGB channel (16.7M colors). Modern 10-bit HDR panels produce 1,024 shades per channel, rendering 1.07 billion colors to eliminate gradient banding.
4K UHD is Actually Four 1080p Screens
Commercial 4K UHD resolution is 3840 × 2160 pixels. It packs exactly four times the pixels of a 1080p Full HD monitor (8.29 million pixels vs 2.07 million pixels).
Display Geometry & Color Spaces Glossary
Learn the fundamental concepts, protocols, and technical terminology of this tool.
Profundidad de Color (Bit Depth)Colorimetría
What is display bit depth (8-bit vs 10-bit)?
The digital bit width assigned to each primary RGB subpixel. 8-bit yields 16.7 million tones; 10-bit delivers 1.07 billion colors, eliminating gradient banding.
Tasa de Refresco (Hz)Frecuencia
What is screen refresh rate in Hz?
The frequency at which the monitor panel redraws the complete image raster per second (e.g., 60 Hz, 144 Hz, or 240 Hz), yielding ultra-smooth motion.
Relación de Aspecto (Aspect Ratio)Geometría
What is monitor aspect ratio?
The proportional ratio between the active horizontal width and vertical height of a panel (e.g., 16:9 standard widescreen, 21:9 ultrawide, or 16:10 productivity).