About CronMaker

What is CronMaker?

CronMaker is a free browser-based tool for building and understanding cron expressions — the scheduling syntax used by Unix cron, Kubernetes CronJobs, GitHub Actions, AWS EventBridge, and dozens of other schedulers.

Features

• Real-time plain-English description of any cron expression
• Next 10 execution times in any IANA timezone
• Standard 5-field and Quartz 6-field cron support
• Platform validation: Unix/Linux, Kubernetes, GitHub Actions, AWS EventBridge, Azure Functions, and more
• DST transition warnings
• 30+ common cron expression templates
• Shareable links via ?expr= URL parameter

Built with

• cronstrue — cron to plain-English description
• cron-parser — next execution time calculation
• Astro + Vue 3 — fast static site with interactive islands
• Cloudflare Pages — global CDN hosting

Contact

Found a bug or have a feature request? Open an issue on GitHub →

For everything else, email hello@cronmaker.dev.

→ Try the cron builder or read the Cron Cheatsheet