What is the regex for 4-digit pin?

The regex pattern for 4-digit pin is `^\d{4}$`. This pattern validates four-digit pin code.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^\d{4}$/;` 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'^\d{4}$', 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 (`/^\d{4}$/i`) or use `re.IGNORECASE` in Python.

Regex for 4-Digit PIN

Regex Pattern

^\d{4}$

Four-digit PIN code

Quick Answer

The regex pattern for 4-digit pin is `^\d{4}$`. Four-digit PIN code. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
1234	✓ Matches
0000	✓ Matches
9999	✓ Matches
123	✗ No match
12345	✗ No match
abcd	✗ No match
12 34	✗ No match

Code Examples

javascript

const regex = /^\d{4}$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\d{4}$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\d{4}$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\d{4}$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\d{4}$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

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6-Digit PIN

Six-digit PIN code

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