Build tracking URLs for marketing campaigns.
View your current screen and viewport dimensions.
Reference guide for common device screen sizes.
Instantly convert any date and time between global time zones with precise, real-time accuracy.
A timer to help you focus using the Pomodoro Technique.
Check the time in different cities around the world.
Keep your JSON files human-readable! Use a JSON Formatter to add indentation and spacing. It makes spotting errors so much easier.
Capture your thoughts and organize your day. Our To-Do List is a clean, simple, and persistent tool to help you keep track of your tasks. Add items, mark them as complete, and filter your view to stay focused. Your list is automatically saved in your browser, so it's always here when you need it.
The tool uses your browser's local storage (LocalStorage) to save your task list directly on your device. This means your data persists even if you close the tab or restart your browser, but it is never sent to any external server.
LocalStorage is a web storage API that allows JavaScript sites and apps to store key/value pairs in a web browser with no expiration date.
No, they are saved in LocalStorage and will be there when you come back.
No, the data is stored locally on this specific device and browser.
Use the 'Clear completed' button in the toolbar. It removes every checked task in one click while leaving your active tasks untouched.
There is no hard limit. The list is stored in your browser, so it comfortably handles hundreds of tasks, though very large lists depend on your device’s available storage.
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.