Why does my string error?

Typos, wrong field count, or unsupported macros make parsers reject input — compare against the builder’s valid template.

Does explainer know my cloud vendor?

EventBridge, Quartz, and Kubernetes cron all differ slightly — treat output as explanatory, not legally binding.

What about six-field cron?

Some systems add seconds as the first field — prepend 0 or consult docs before pasting here.

How are day fields combined?

Some engines OR day-of-month and day-of-week while others AND — your operator manual decides rare edge cases.

Will DST double-fire?

Explainers show nominal wall-clock times; always observe real logs when clocks spring forward or fall back.

Can I reverse into a builder?

Copy the explanation back into the Cron Builder to tweak individual fields visually.

Strings stay local — nothing uploads to QuickCalci.

Readable strings for auditors?

Paste summaries into change tickets for SOX or ISO reviews.

Cron Expression Explainer

Dev Live

Translate any cron expression into plain English.

About this tool

Cron Expression Explainer — Translate any cron expression into plain English. Free, fast and private. Runs entirely in your browser at Quick Calci Tools.

Examples

Common scenarios for the Cron Expression Explainer.

Quarter-hour

cron: */15 * * * *

Every 15 minutes — verify timezone on the target host.

Weekly backup

cron: 0 2 * * 0

02:00 every Sunday in the scheduler’s timezone.

Who uses the Cron Expression Explainer?

Common scenarios and audiences for this tool.

On-call leads

Decode pager-duty windows encoded as legacy cron.

Platform engineers

Verify terraform module strings before apply.

DBAs

Confirm index rebuild jobs won’t collide with ETL.

Consultants

Document client cron for handover PDFs.

Students

Translate asterisk fields into spoken schedules.

Frequently asked questions

Everything you need to know about the Cron Expression Explainer.