What is it?
My Screen Resolution shows the details of the screen you are using right now. It gives the size websites see, the real number of pixels, the browser window size, the aspect ratio, the refresh rate and whether the screen supports touch and HDR.
Who is it for?
Web designers and developers testing layouts, support staff asking users for screen details, gamers checking refresh rate, and people buying monitors.
How to use it
- Open the page: details appear at once. Rotate or resize to see them update.
- Tap Measure refresh rate again for a fresh reading.
- Copy all to send the details to someone.
Why it matters
Designers test at common CSS widths (360–430 px for phones). Nothing about your device is sent anywhere.
Errors and how to fix them
- Resolution lower than advertised: websites see CSS pixels; real pixels = CSS pixels × pixel ratio (e.g. 390 × 3 = 1170 on many phones).
- Refresh rate shows 60 on a 120 Hz screen: battery saver can lower it; check display settings.
Questions people ask
- What is pixel ratio? How many real screen pixels make one CSS pixel; phones are usually 2–3.
- What is HDR? High dynamic range: brighter highlights and deeper colours, if your screen and browser support it.
Example
A phone showing 412 × 915 CSS pixels with a pixel ratio of 2.625 has a real resolution of about 1080 × 2400.
Open the tool: My Screen Resolution
Still stuck?
Contact support. Tell us which tool or page you were using, what you tapped, what you saw, and your phone or computer and browser (for example: Android phone, Chrome). We reply by email.
Questions, or an error not listed here?
Tell us in the comments: what you were doing, the exact message you saw, and your device and browser. We read every comment and add new fixes to this article.