crongen
Free · No signup required

About crongen

We built crongen because cron syntax is powerful but easy to get wrong. Our goal is to make scheduling expressions understandable, verifiable, and fast to create — whether you're writing your first crontab or debugging a production job.

Our mission
Why this tool exists

Cron expressions are everywhere — Linux crontabs, Kubernetes CronJobs, GitHub Actions, AWS EventBridge, and countless schedulers. Yet the syntax remains opaque: five fields, special characters, and dialect differences between Unix and Quartz can trip up even experienced developers.

crongen bridges that gap. Type or build an expression, read what it means in plain English, and confirm the next run times before you ship. No account, no paywall, no friction — just a focused tool that does one thing well.

What you can do

Everything you need to work with cron schedules in one place.

Visual builder

Pick minutes, hours, days, and months from dropdowns — no memorizing field order or syntax rules.

Plain-English translation

Paste any cron expression and get an instant human-readable description of when it runs.

Next run preview

See the next several execution dates so you can verify a schedule before deploying it.

Unix & Quartz support

Works with standard 5-field Unix cron and extended 6/7-field Quartz expressions.

Instant copy

One click to copy the expression to your clipboard — ready for crontab, Kubernetes, or CI configs.

80+ examples

Browse common schedules — every minute, weekdays at 9 AM, first of the month, and more.

Who it's for
Built with real workflows in mind
  • Developers setting up local or server crontabs
  • DevOps engineers configuring Kubernetes CronJobs
  • SREs validating backup and maintenance schedules
  • Anyone learning cron syntax for the first time

Ready to build a schedule?

Open the interactive builder or browse our library of common expressions.

Open Cron BuilderBrowse Examples