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Validation
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Regex for Credit Card Number Format

This is a format-only pattern for card-like numbers. It is appropriate for client-side input cleanup, but real validation still needs Luhn checks and payment processor rules.

Regex
/^(?:\d[ -]*?){13,19}$/

Try this pattern

Matches current input
4242 4242 4242 4242

1 match found in the current text.

Passing examples

  • 4242 4242 4242 4242
  • 5555-5555-5555-4444

Failing examples

  • 1234
  • card-4242

Code examples

JavaScript
const regex = /^(?:\d[ -]*?){13,19}$/g;
regex.test(input);
Python
import re
pattern = re.compile(r"^(?:\d[ -]*?){13,19}$")
bool(pattern.search(input))
Go
re := regexp.MustCompile("^(?:\\d[ -]*?){13,19}$")
matched := re.MatchString(input)

Related Validation Patterns

Regex for Valid Email Address
/^[^\s@]+@[^\s@]+\.[^\s@]+$/i
Regex for URL Slug
/^[a-z0-9]+(?:-[a-z0-9]+)*$/
Regex for Strong Password
/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^A-Za-z\d]).{12,}$/
Regex for UUID v4
/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
Regex for IPv4 Address
/^(?:25[0-5]|2[0-4]\d|1?\d?\d)(?:\.(?:25[0-5]|2[0-4]\d|1?\d?\d)){3}$/
Regex for Hex Color
/^#?(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/