Cron expression generator
Build a 5-field cron schedule expression with a plain-English description.
The cron expression generator lets you set each of the 5 standard cron fields (minute, hour, day of month, month, day of week) and see both the resulting cron expression and a plain-English description update live, so you can build and sanity-check a schedule without memorizing cron syntax.
Cron expression
0 9 * * *
Plain-English description
At 09:00
How to use
- Fill in any field you want to restrict (minute, hour, day of month, month, day of week) — leave a field as "*" to mean "every".
- The cron expression and a plain-English description update as you type.
- Copy the expression into your crontab or scheduler.
Common use scenarios
- Building a cron schedule for a server task or CI job.
- Double-checking that an existing cron expression means what you think it does.
- Learning cron syntax by experimenting with fields and watching the description change.
- Quickly generating a common schedule like "every day at 9am" without recalling the field order.
✓Content & verification reviewed: 2026-08-27
How we verify Cron expression generator
How to confirm the generated expression matches the schedule you intend.
Fields are always in the standard order: minute, hour, day of month, month, day of week
Cron's field order is a common source of mix-ups — this tool's layout matches the standard order so the expression it builds slots directly into a normal crontab or scheduler.
"*" means "every" for that field
Leaving a field as "*" means it doesn't restrict the schedule at all — for example, "*" in the hour field with a specific minute means "that minute, every hour."
The plain-English description is a best-effort summary, not a formal parser
It correctly describes simple numeric schedules but doesn't interpret step (*/5) or range (1-5) syntax — if you type those directly into the expression, verify the resulting schedule against your scheduler's own documentation.
Before you rely on the result
- You've confirmed the field order matches minute, hour, day of month, month, day of week.
- Each field you didn't intend to restrict is left as "*".
- You've read the plain-English description and it matches your intent.
- You've tested the expression in your actual scheduler before relying on it for something time-sensitive.
Who this is for
- Developers and sysadmins building a cron schedule for a server task.
- Anyone double-checking what an existing cron expression actually means.
- People learning cron syntax by experimenting with the fields.
- Anyone who needs a common schedule without memorizing field order.
Real-world examples
Scheduling a backup job
A sysadmin sets the fields for "every day at 2am" and copies the resulting expression into a backup script's crontab entry.
Checking an inherited cron job
A developer pastes an existing project's cron fields into the tool to get a plain-English read on when it actually runs.
Learning cron syntax
Someone new to cron adjusts each field one at a time and watches the description change to build an intuition for how the fields interact.
Limitations
- Supports plain numeric values and "*" per field — it doesn't validate step (*/5) or range (1-5) syntax, though you can still type those directly into the expression.
Frequently asked questions
What does "*" mean in a field?
It means that field doesn't restrict the schedule — "every" minute, hour, day, month, or day of week, depending on which field it's in.
Can I use step values like */5 or ranges like 1-5?
You can type them directly into the expression, but the plain-English description won't interpret that syntax — it's built for simple numeric or wildcard fields.
What's the field order?
Minute, hour, day of month, month, day of week — the standard 5-field cron order used by most schedulers.
Does this validate my expression against a real scheduler?
No — it builds a syntactically standard cron expression, but you should still test it in your actual scheduler before relying on it.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-27
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