The developer tools you reach for every day, all in one place.
Converters, formatters, hashes, validators, and the small utilities you keep reopening stay together instead of getting lost across tabs.
/ Tools
■Crontab Guru
Explain cron expressions in human-readable form with next execution times
What is Cron?
Cron is a time-based job scheduler in Unix-like operating systems. Users can schedule jobs (commands or scripts) to run at specific times, dates, or intervals. The cron expression syntax is used to define these schedule…
How does it work?
Cron Expression Format A standard cron expression has 5 fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0 is Sunday). Special Characters * - matches any value , - separ…
Sample Cases
Covers Every 5 minutes, Every day at 9 AM, and Every Monday at 8:30 AM so you can compare common inputs and outputs quickly.
/ Code
■Source code from the selected tool, shown here alongside the live version on the right.
// No external dependencies needed - pure JavaScript/TypeScript
interface CronSchedule {
minute: number[];
hour: number[];
dayOfMonth: number[];
month: number[];
dayOfWeek: number[];
}