📐

Screen Size

screen.width—

screen.height—

avail width—

avail height—

color depth—

pixel depth—

🔢

Pixel & Density

CSS pixel-ratio—

JS pixel-ratio—

resolution dpi—

resolution dppx—

resolution dpcm—

refresh ratedetecting…

🖥️

Display Features

HDR—

color gamut—

color scheme—

contrast pref—

reduced motion—

pointer type—

⚙️

Viewport & Window

root font size—

orientation—

aspect ratio—

zoom level—

scroll X0px

scroll Y0px

Est. Screen Size

—

inches diagonal

— cm

Width—

Height—

Width—

Height—

Screen px (W)—

Screen px (H)—

DPI used—

Pixel diagonal—

Result (inches)—

Result (cm)—

💡 Estimation uses screen.width × screen.height at reported DPI. Actual size may vary by device calibration.

🌐

Browser

name—

version—

engine—

language—

cookies—

do not track—

ad blockerchecking…

incognitochecking…

click to copy —

💻

OS & Platform

device type—

os—

platform—

architecture—

timezone—

utc offset—

online—

safe area top—

⚡

Hardware

cpu cores—

device memory—

max touch pts—

touch screen—

hover capable—

vibration—

wake lock—

webgl—

🎮

GPU & Canvas

gpu vendor—

gpu renderer—

webgl ver—

canvas 2d—

webp support—

css grid—

service worker—

localstorage—

📡

Network

connection type—

effective type—

downlink—

rtt—

save data—

ip versiondetecting…

🌍

Location & ISP

countrydetecting…

city—

region—

isp—

timezone—

ip address—

🔋

Battery

level —

charging—

time to full—

time to empty—

🔐

Permissions

cameraCheck

microphoneCheck

geolocationCheck

notificationsCheck

clipboardCheck

🧪

Media Query Tester

🔤

Font Size Converter

rem

Base: 16px · pt: 12pt · vw: —vw

🔑

Device Fingerprint

canvas hash—

audio hash—

font hash—

Generating…

🔡

Font Detection

detecting…

What is Know My Width?

The most complete free device inspector — 60+ specs including screen size, viewport, DPI, physical size in inches, refresh rate, battery, network, browser, OS, GPU, canvas fingerprint, font detection, ad blocker, incognito mode, ISP, location, media query tester, font size converter and more.

📐

Viewport & ScreenReal-time px, em, resolution

📏

Screen Size InchesPhysical diagonal estimation

🔄

Refresh RateHz detection via rAF

🔋

Battery StatusLevel, charging, time

📡

Network & ISPType, speed, country

🔑

FingerprintCanvas, audio, font hash

🔡

Font DetectionSystem fonts installed

🛡️

Ad Blocker & IncognitoPrivacy detection

🧪

MQ TesterLive media query checker

🔤

Font Converterpx ↔ rem ↔ em live

Know My Width — Ultimate Device & Screen Inspector

What is Know My Width?