Build tracking URLs for marketing campaigns.
Reference guide for common device screen sizes.
Instantly convert any date and time between global time zones with precise, real-time accuracy.
A simple to-do list that saves your tasks in the browser.
A timer to help you focus using the Pomodoro Technique.
Check the time in different cities around the world.
Ever wondered what's inside a JWT? You can decode the header and payload to see the claims, which is super helpful for debugging authentication.
Know your viewport. Get detailed specs about your current screen resolution, window size, and pixel density. A must-have for testing responsive designs.
Designers often guess what 'mobile' or 'desktop' size means. This tool gives you the hard numbers for your specific device, helping you identify exactly which CSS media query is active.
It reads `window.innerWidth`/`Height` for the viewport and `window.screen.width`/`Height` for the physical display. It also checks `window.devicePixelRatio`.
Screen size is your physical monitor. Viewport is just the area of the web page (excluding browser bars). Responsive design cares about viewport.
Modern screens pack more pixels into the same space for sharpness. A ratio of 2 means there are 2 physical pixels for every 1 CSS pixel.
No, this information is just read from your browser to show you. it is not recorded.
All calculations and data processing for this tool are performed locally in your browser. UtilToolkits does not send any of your data to an external server, ensuring your information remains private and secure.