Home › Developer Tools › Screen Resolution Checker
🖥️ Screen Resolution Checker
See your screen resolution, browser window size, pixel ratio and orientation right now.
About this Screen Resolution Checker
Your screen resolution is not the same as your browser window size, and neither matches the CSS pixels a website actually sees. This checker reports all of them live: the physical screen, the area not covered by taskbars, the viewport, the full window, the device pixel ratio and the orientation — the numbers you need when testing responsive designs or reporting a display bug.
How to use it
- Open the page — your values appear instantly.
- Resize the browser window or rotate your phone and watch the viewport numbers update.
- Click Refresh values to re-read everything.
- Quote the viewport size when reporting layout problems.
Example
A laptop might show screen 1920 × 1080, but a viewport of 1365 × 889 once the browser chrome and a half-size window are taken into account.
Frequently asked questions
Why is my viewport smaller than my screen?
The taskbar, browser toolbars, bookmarks bar and window borders all take space. The viewport is only the area the web page itself gets.
What is device pixel ratio?
How many physical pixels make one CSS pixel. Retina and most phone screens use 2 or 3, which is why screenshots look sharper than the CSS size suggests.
More Developer Tools
Password Generator
Create strong random passwords in your browser with a live entropy strength meter.
QR Code Generator
Turn any text or link into a QR code you can save — generated right in your browser.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back, with safe UTF-8 handling for any language.
JSON Formatter
Format, minify and validate JSON, with clear error positions and quick structure stats.
URL Encoder & Decoder
Encode or decode URLs and query text safely, with component or full-URL modes.
JSON to CSV Converter
Convert a JSON array of objects to CSV, or turn CSV back into clean JSON.