What Is My Screen Resolution

Find out your screen resolution and a lot more in one glance. See the full resolution of your display, the size of the browser window, the device pixel ratio, the colour depth and the aspect ratio. Everything updates live as you resize the window or move to another screen. Free, no sign-up.

  • No app to install
  • 100% free
  • Nothing is recorded
  • No sign-up, no email
  • Works on any device
Read the guide: What Is My Screen Resolution
Reading your screen…

How to use it

  1. 1

    Read your resolution

    The headline number is your screen resolution in pixels, width by height. Below it you get the browser window size and the available screen area.

  2. 2

    Check the pixel ratio

    The device pixel ratio shows how many physical pixels make up one CSS pixel, which is why a high-density screen reports more detail than its resolution suggests.

  3. 3

    Resize to compare

    Drag the window smaller or larger and watch the viewport figures change live, or drag the tab to another monitor to read that screen instead.

When it comes in handy

Filling in a support form

Grab your exact resolution, pixel ratio and colour depth in seconds when a help desk or developer asks for them.

Web and design work

Confirm the real viewport size and pixel ratio you are designing against, which differ from the raw screen resolution on high-density displays.

Checking a new monitor

Verify a screen is actually running at its native resolution and refresh, not a lower fallback the system picked.

Instant & 100% private — nothing is recorded

The test runs right here in your browser. When it needs your camera or microphone, the feed is shown to you and nothing else: never uploaded, never recorded to a server, never stored. There is no sign-up and no email wall, and most tests keep working with no connection at all.

Frequently asked questions

What is the difference between screen resolution and window size?
Screen resolution is the total pixels your whole display has, while the window size is just the part the browser is using right now. If the browser is not full screen, the window is smaller than the screen. The test shows both so you can tell them apart at a glance.
What is device pixel ratio and why does it matter?
Device pixel ratio is how many physical screen pixels make up one CSS pixel. A ratio of 2 means a high-density screen packs four physical pixels into the space of one logical pixel, which is why text looks sharp. It explains why a phone reporting 1170 pixels wide behaves like a 390-pixel layout.
Why does my resolution look smaller than the box says?
On high-density screens the browser reports the logical resolution, which is the screen resolution divided by the device pixel ratio. Multiply the reported width and height by the pixel ratio to get the true physical pixel count the manufacturer advertises.
Does this test send anything to a server?
No. The whole test runs in your browser on your own device, and nothing it reads is uploaded, recorded or stored. You can prove it by disconnecting from the internet after the page loads: the test keeps working. There is no sign-up and no account.

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