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Viewport Size Checker
- Free
- Runs in browser
- No download
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Viewport (CSS pixels)—
Screen resolution—
Device pixel ratio—
- Runs in your browser
- Nothing uploaded
- 100% free
- Works on phones
Resize the window to see the viewport update live. The viewport is the visible browser area — it excludes the taskbar, scrollbar and browser chrome.
Viewport ≠ screen resolution. Your physical display may be 1920×1080 but the viewport is usually smaller due to browser UI elements.
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