CRON Expression Builder
Build CRON expressions visually, translate them to plain English, and preview the next 10 execution times. No syntax errors, no guessing.
Build Your Expression
Your CRON Expression
Translate an Expression
CRON Syntax Quick Reference
1,3,5
- Range — e.g. 1-5
*/n Step — every n units, e.g. */15
Translation
Common Presets
Click any preset to load it into the Visual Builder.
What are CRON expressions?
CRON expressions are scheduling patterns used in Unix-like systems to automate tasks. Each expression has five fields — minute, hour, day of month, month, and day of week — that together define exactly when a job runs.
Visual Builder
No syntax memorisation needed. Pick from dropdowns, see the expression update in real time.
Reverse Translator
Paste any CRON expression and get an instant plain-English explanation plus next execution preview.
Now Monitor Them
Built the schedule? Let Site Qwality alert you the moment a CRON job misses its window.
CRON monitoring →Start watching in under a minute.
Every product starts free — uptime, cron, synthetic, logs, RUM, incidents, and status pages. No credit card required.