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Parse a cron expression into readable schedule fields, alias expansions, and a plain-English summary in the browser.
Parse a cron expression into readable schedule fields
Paste a standard 5-field cron expression or a supported alias to inspect each field, the normalized schedule, and the human-readable summary.
Inspect cron syntax without mentally decoding minute, hour, day, month, and weekday fields
Use Cron Parser when you need to explain a crontab line, verify a copied schedule, or check what a cron alias expands to before you ship it into a server, scheduler, or app config.
Supports standard 5-field cron expressions. Example: 30 9 * * 1-5.
Parsed cron result
See the next run times first, then confirm the schedule summary, quick facts, and field breakdown.
Next run Execution time depends on your scheduler timezone
The next scheduled run will appear here after you enter a valid cron expression.
Next 5 runs Execution time depends on your scheduler timezone
Upcoming run times will appear here after you enter a valid cron expression.
Ready 5-field cron required
Parsed cron details will appear here.
Copy-ready plain English summary No summary yet
A copy-ready summary will appear here after you enter a valid cron expression.
Field breakdown No fields yet
Minute, hour, day, month, and weekday explanations will appear here.
Important notes No notes yet
Short notes about timezone, aliases, and scheduler differences will appear here.
How to use Cron Parser
- Paste a standard 5-field cron expression or an alias such as `@daily` into the input box.
- Click Parse cron to get the schedule answer first.
- Use the execution summary to confirm when it runs before reading the full field breakdown.
- Copy the plain-English summary when you need a quick note for docs, tickets, or handoff.
Cron parser examples
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what does 30 9 * * 1-5 mean
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what does 0 0 * * * mean
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cron expression every 5 minutes
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cron expression for the first day of the month at noon
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cron parser for @daily
What this cron parser does
This tool turns a cron line into a schedule you can read quickly. It is useful when you need to review a copied cron expression, explain it to someone else, or confirm whether it runs daily, on weekdays, every few minutes, or only on specific dates.
Common cron expressions explained
What does `30 9 * * 1-5` mean? Runs every weekday at 09:30. Next runs usually look like: Tue 09:30, Wed 09:30, Thu 09:30, Fri 09:30.
What does `0 0 * * *` mean? Runs every day at midnight. Simple version: once per day, weekends included, at 00:00.
What does `*/5 * * * *` mean? Runs every 5 minutes. Typical next runs look like: 08:05, 08:10, 08:15, 08:20, 08:25.
Cron Parser vs Cron Builder
Cron Parser is for understanding an existing cron expression. A builder is for creating one from scratch. If you already have a cron line and just need to know what it does, use the parser. If you need help assembling fields, use a builder.
What this parser does not do
Cron Parser explains the schedule, but it does not execute jobs or predict the exact next run time for every scheduler. Time zones, weekday numbering, and extended syntax can still vary between systems, so treat the result as a readable explanation, then confirm runtime behavior in the scheduler that will run it.
Cron parser FAQs
What does 30 9 * * 1-5 mean?
It means the job runs at 09:30 on weekdays. Simple version: Monday through Friday, once per day.
Does this cron run on weekends?
It depends on the day-of-week field. If the parser shows Monday-Friday, then no. If it shows every day or includes Saturday or Sunday, then yes.
How often does this cron run?
Check the Frequency line in the execution summary. It tells you whether the cron runs once per day, once per hour, every few minutes, or on some other repeating pattern.
What timezone does this cron use?
Standard 5-field cron does not define a timezone by itself. Simple version: the scheduler decides that part.
Does this parser execute the cron job?
No. It only explains the cron line. It does not run jobs, queue tasks, or simulate your scheduler.
Why can the same cron line behave differently on different systems?
Because cron syntax is not perfectly uniform. Some systems handle weekdays, aliases, or extra fields differently, so the final behavior still depends on the scheduler.