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Cron expression generator

Build a cron schedule field by field — minute, hour, day of month, month, weekday — and see the expression and a plain-language description update live. One-click presets cover the common schedules, and the syntax (*, */5, 1-5, 1,15) is explained inline.

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Cron expression generator works straight from this page — free, instant, nothing to install. It covers *, */5, 1-5, 1,15 — adjust any of them and the result follows immediately.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Cron expression generator do?

Build a cron schedule field by field — minute, hour, day of month, month, weekday — and see the expression and a plain-language description update live. One-click presets cover the common schedules, and the syntax (*, */5, 1-5, 1,15) is explained inline.

What does a concrete case look like?

*/15 * * * 1-5 → 00:00, 00:15, 00:30, 00:45 … — the tool shows every step in between, not just the final figure.

What does it take into account?

It factors in *, */5, 1-5, 1,15. Change any of them and the output follows immediately.

When would I actually use this?

Finding out how big a thing will be before you make it: how many gigabytes an hour of footage takes, how long a file needs on the connection you have, how large a photo prints before it goes soft, what bitrate fits the budget you were given.

What is the most common mistake?

Taking the advertised connection speed as the transfer speed. A 100 Mb/s line is megabits, the file is in megabytes, and the eight-fold difference between them is where most download estimates go wrong — before overhead and contention take their own share.

What else is filed next to it?

ASCII Table Reference, Aspect ratio calculator and Audio file size calculator share its section. They are not variants of it — being filed together is not the same as being alike — but that is where to look if this turned out not to be the tool you wanted.

Where do the figures come from?

Byte prefixes follow the IEC convention where a kibibyte is 1 024 bytes and a kilobyte is 1 000 — drive makers use the second, operating systems often report the first, and a disk that shrinks on arrival is that gap and nothing else. Print sizing assumes 300 dpi unless you change it.

Further reading

All guides →
How-toHow to Write a Cron Expression: Five Fields and the OR Rule Nobody MentionsMinute, hour, day of month, month, day of week. The traps are that a step is a stride through a range and not an interval, and that the two day fields are combined with OR — so 0 0 1 * 1 fires on the 1st and on every Monday.ExplainerWhat Is a Cron Expression?A cron expression schedules a task to run automatically at set times. Here's what it's for, its five fields, how to read one, and the common gotchas.ExplainerHow Unix File Permissions Work: Reading 755 Without GuessingRead is 4, write is 2, execute is 1, and each of the three digits describes a different party. The part most explanations get wrong is what the execute bit does on a directory — it grants traversal, not the right to run anything.ExplainerWhat Is Bitrate? Bits per Second, CBR vs VBRBitrate is how many bits of data a video or audio stream uses each second. Learn how it sets quality and file size, and the difference between constant and variable bitrate.ExplainerHow Much Data Streaming Uses: SD, HD, and 4K per HourSee how many gigabytes per hour SD, HD, and 4K video use, and how to check a monthly streaming habit against a data cap.How-toHow Much Internet Speed Do You Need? A Household GuideWork out the internet speed your home needs by adding up Mbps per video stream, video call, and gamer, with clear examples.