Cron Expression Generator — Visual Builder for K8s, AWS & GitHub Actions
Build cron expressions visually with timezone-aware next-run previews. Supports Standard, Quartz, AWS EventBridge, Kubernetes CronJob, and GitHub Actions formats. 25 presets, schedule grid, YAML snippets, and shareable URLs. See exactly when your job fires — no more guessing cron syntax.
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Frequently Asked Questions
What cron formats are supported?
Five formats: Standard 5-field (Linux/Unix), Quartz/Spring 6-field (with seconds), AWS EventBridge 6-field (with year, wrapped in cron()), Kubernetes CronJob (standard + @shortcuts), and GitHub Actions (standard, always UTC).
Can I see when my job will run next?
Yes! The tool shows the next 10 execution times in any timezone you choose from a full list of IANA timezones. It defaults to your local timezone.
How does format switching work?
When you switch between formats, your expression is automatically converted. For example, switching from Standard to Quartz adds a '0' seconds field, and switching to AWS adds a year field and wraps in cron().
What is the visual schedule grid?
Three rows of cells showing which hours (0-23), days of week (Sun-Sat), and months (Jan-Dec) your cron expression fires on. Active cells are highlighted so you can spot mistakes at a glance.
Can I share my cron expression?
Yes! Click Share to copy a URL that encodes your expression, format, and timezone. Anyone who opens it will see the same setup.
Is my data private?
Everything runs in your browser. No cron expressions are sent to any server. Expression history is stored in localStorage on your device only.