What is the regex for cron expression (5-field)?

The regex pattern for cron expression (5-field) is `^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$`. This pattern validates standard 5-field cron expression (min hour dom month dow).

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^(?:[0-9*,\/-]+\s+){4}[0-9*,\/-]+$/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$/i`) or use `re.IGNORECASE` in Python.

Regex for Cron Expression (5-field)

Regex Pattern

^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$

Standard 5-field cron expression (min hour dom month dow)

Quick Answer

The regex pattern for cron expression (5-field) is `^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$`. Standard 5-field cron expression (min hour dom month dow). This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
* * * * *	✓ Matches
0 9 * * 1-5	✓ Matches
/5 * * *	✓ Matches
0 0 1,15 * *	✓ Matches
* * * *	✗ No match
* * * * * *	✗ No match
invalid	✗ No match
60 * * * *	✗ No match

Code Examples

javascript

const regex = /^(?:[0-9*,\/-]+\s+){4}[0-9*,\/-]+$/;
const isValid = regex.test(value);

python

import re
pattern = r'^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^(?:[0-9*,/-]+\s+){4}[0-9*,/-]+$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^(?:[0-9*,\/-]+\s+){4}[0-9*,\/-]+$/', $value)) {
    echo "valid";
}

java

String pattern = "^(?:[0-9*,/-]+\\s+){4}[0-9*,/-]+$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

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Valid CSS class name (starts with letter, underscore, or hyphen)

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CSS ID selector starting with #

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JSON object key (quoted string followed by colon)

Semantic Version (Strict)

Strict semantic versioning (MAJOR.MINOR.PATCH)