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Screen Size Checker

Developer Tools

Check screen size, viewport and pixel ratio in one page

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Views
22
Stack
2 tools
Launched
Nov 2026

Overview

In the maker's words.

A free browser tool that reports the screen size, viewport and device pixel ratio your browser exposes, and explains how CSS pixels differ from device pixels. No install, no signup, nothing uploaded.

Stack

The tools and technologies listed by the maker.

HTML/CSS Framework JavaScript Framework

Milestones

What the maker has shipped since launch, newest first.

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Feedback

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Browse related lists

Category All Developer Tools products Every published product in this category. Stack pair HTML/CSS + JavaScript 8 published products use both. Stack type Frameworks for Developer Tools 80 developer tools products list a framework. Launch month Launched in November 2026 Products that launched the same month.