What is the regex for docker container id?

The regex pattern for docker container id is `^[0-9a-f]{12}(?:[0-9a-f]{52})?$`. This pattern validates docker container id (short 12 or full 64 hex chars).

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^[0-9a-f]{12}(?:[0-9a-f]{52})?$/;` 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'^[0-9a-f]{12}(?:[0-9a-f]{52})?$', 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 (`/^[0-9a-f]{12}(?:[0-9a-f]{52})?$/i`) or use `re.IGNORECASE` in Python.

Regex for Docker Container ID

Regex Pattern

^[0-9a-f]{12}(?:[0-9a-f]{52})?$

Docker container ID (short 12 or full 64 hex chars)

Quick Answer

The regex pattern for docker container id is `^[0-9a-f]{12}(?:[0-9a-f]{52})?$`. Docker container ID (short 12 or full 64 hex chars). This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
a1b2c3d4e5f6	✓ Matches
abc123def456	✓ Matches
a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6abcd	✓ Matches
a1b2c3d4e5	✗ No match
A1B2C3D4E5F6	✗ No match
not-hex-chars	✗ No match

Code Examples

javascript

const regex = /^[0-9a-f]{12}(?:[0-9a-f]{52})?$/;
const isValid = regex.test(value);

python

import re
pattern = r'^[0-9a-f]{12}(?:[0-9a-f]{52})?$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^[0-9a-f]{12}(?:[0-9a-f]{52})?$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^[0-9a-f]{12}(?:[0-9a-f]{52})?$/', $value)) {
    echo "valid";
}

java

String pattern = "^[0-9a-f]{12}(?:[0-9a-f]{52})?$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

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