Does this calculate next run times?

It provides human-readable descriptions. Use your scheduler for exact next executions.

Are time zones handled?

Descriptions follow the expression only; apply server timezone context separately.

What if parsing fails?

Invalid expressions show an error so you can fix fields.

Does this support seconds field?

Standard five-field Unix cron is supported.

Use timestamp converter when inspecting JWT exp values alongside schedules.

Developer Utilities

Cron Expression Parser

Explain standard five-field cron expressions in plain English for crontab, workers, and CI schedules.

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Decode standard cron expressions into plain English for crontab entries, workers, and CI schedules—locally in your browser.

Reading cron syntax quickly

Five-field cron strings are compact but easy to misread. A cron parser online explains minute, hour, day-of-month, month, and day-of-week fields in human language before you edit production schedules.

Supported expression styles

The parser focuses on common Unix-style cron patterns including ranges, steps, and lists. Validate expressions here before pasting into servers or workflow YAML.

How it works

1Paste a five-field cron expression such as `0 */6 * * *`.
2The parser validates syntax and returns a human-readable schedule description.
3Use the explanation when reviewing jobs without modifying server crontabs here.

Examples

Every six hours

0 */6 * * *

Weekday mornings

15 2 * * 1-5

Weekly Sunday job

0 0 * * 0

Every minute (demo)

* * * * *

When to use this tool

Explain GitHub Actions cron schedules.
Review legacy crontab lines during migrations.
Document worker schedules for on-call runbooks.
Sanity-check staging job timing before promote.
Teach junior engineers cron field order.
Pair with timestamp converter for claim exp review.

Cron Expression Parser