Random & Productivity Guides
Step-by-step guides for image, PDF, developer, text, random, and productivity tools.
How to Create Fair Random Teams for Classes and Events
Random Team Generator: A random and classroom utility that produces results instantly in your browser.
How to Use a Random Wheel for a Fair Draw
A fair draw requires removing accidental duplicates, publishing rules and weights in advance and recording results. A web wheel is not legal certification.
Seven Ways to Use a Countdown Timer for Focus
Countdown Timer: A time, date and productivity utility that works directly in the browser.
How to Calculate Percentages, Discounts, and Change
Calculate a percentage of a number, percentage relationships and percentage increase or decrease.
Recommended tools
Roulette Wheel
Create a random name wheel from a list, use fullscreen, remove selected entries and keep result history with browser cryptographic randomness.
Random Team Generator
Split a list of people into randomly balanced groups for classes, activities, games and events.
Event Countdown
Create a titled countdown to an IANA-zone date and time, including past targets, fullscreen mode and database-free share links.
Percentage Calculator
Calculate a percentage of a number, percentage relationships and percentage increase or decrease.
Online Timer
Set hours, minutes or seconds with presets, pause/resume, sound, notifications and target-time recovery after backgrounding.
International Meeting Planner
Add cities, compare a 24-hour timeline, set working hours and find less disruptive meeting slots across time zones.