Initializing Tool...
Check your screen resolution, viewport size, DPR, and compare against common device breakpoints.
The Viewport Tester displays your current screen resolution, browser viewport dimensions, device pixel ratio (DPR), color depth, and orientation. It also compares your viewport against 17 common device breakpoints to show which device profile you are closest to.
Open the tool and the live stats update automatically as you resize your browser or rotate your device. Click Copy Resolution to copy your current viewport dimensions to the clipboard, or Refresh to manually update the readings.
Responsive design requires testing across breakpoints. Knowing your exact viewport size and how it maps to real-world devices helps you debug media queries and ensure your layouts work for the target audience's screens.
Base64 Encoder / Decoder
Instantly encode and decode strings to Base64.
URL Encoder / Decoder
Safely encode and decode URL components and parameters.
QR Code Generator
Generate highly customizable QR codes with safe margins and error correction.
Barcode Generator
Generate standard barcodes including CODE128, EAN, UPC, and more.