Cron Tester

H by Hatchable

Test cron expressions, see next runs, save your library. Crontab.guru + AI.

C

Cron expression editor + library + AI explainer. Test any expression (visual editor, next-runs preview across 9 timezones, plain-English AI explanation), save your library, copy the expression into your own infrastructure when ready.

Deliberately doesn't fire scheduled jobs itself — for that, use Cronitor, AWS EventBridge, k8s CronJob, or Hatchable's native [[cron]] block. This tool helps you write the expression right.

Replaces crontab.guru (read-only) with a library + AI superpowers.

Talk to it from your AI

Once Cron Tester is on your account, the same AI you used to install it can read its data, send its emails, and change its code — for the life of the project. Try things like:

“When does "0 9 * * 1-5" next fire in New York time?”
“Save this expression as "weekday morning digest" in my library.”
“Convert this description into cron: every other Wednesday at 3pm.”
“Show me every expression in my library that fires on weekends.”

Every Hatchable project ships with an MCP server scoped to it — how it works.

What you get

  • Source code, deployed to your account on Hatchable
  • Your own subdomain (or BYO custom domain on the Pro plan)
  • A real Postgres database, scoped to this app
  • The ability to make a copy, edit it, and redeploy via your AI tool
  • CSV export of your data, any time