Responsive Screen Size Tester
Inspect current viewport metrics, device pixel ratio, Tailwind breakpoint status, and simulate common device dimensions.
Input Buffer
ENCODING: UTF-8AUTO-RUN: ENABLED
Output Buffer
OUT: 1 LN · 0 B⌘↵ RUN · ⌘⇧C COPY
How to Use Responsive Screen Size Tester
- Inspect live browser viewport dimensions, DPR, orientation, and standard device presets (iPhone 16, Pixel 9, iPad Pro, 1440p Desktop).
Keyboard Shortcuts & Sandbox Guarantee
Run / Process tool outputCtrl + Enter
Copy primary output to clipboardCtrl + Shift + C
Open global command paletteCtrl + K
More in Web Development Tools
HTML Formatter
Prettify and indent nested HTML5 markup with clean tag alignment and attribute preservation.
CSS Formatter
Format minified or messy CSS stylesheets with consistent 2-space indentation and rule spacing.
JavaScript Formatter
Format and indent JavaScript ES2024+ code blocks, functions, and object literals for readability.
TypeScript Formatter
Format TypeScript interfaces, types, generics, and modules with clean indentation and semicolon normalization.
HTML Minifier
Compress HTML documents by removing comments, collapsing inter-tag whitespace, and trimming attributes.
CSS Minifier
Minify CSS stylesheets for production by removing comments, spaces, and trailing semicolons.