Authentication & Security · In-Browser Regular Expression Lab

MD5 Hash Regex — Validate 32-Character Hexadecimal Hashes

Matches 32-character hexadecimal MD5 hash checksum strings.

Pattern:

Regular Expression Pattern & Flags

Flags:

//none

Live Test String

Match Found

Load Sample:

Match Inspection & Details1 match

Match #1:5d41402abc4b2a76b9719d911017c592

Test Samples Verification Matrix

Expected Valid Samples (Should Match)

5d41402abc4b2a76b9719d911017c592 Pass

098f6bcd4621d373cade4e832627b4f6 Pass

Expected Invalid Samples (Must Reject)

5d41402abc4b2a76b9719d911017c59 Rejected (Pass)

5d41402abc4b2a76b9719d911017c592z Rejected (Pass)

Code Implementation Generator

// JavaScript / TypeScript (ES6+)
const pattern = /^[a-fA-F0-9]{32}$/;
const text = "5d41402abc4b2a76b9719d911017c592";

const isMatch = pattern.test(text);
console.log("Is Match:", isMatch);

if (isMatch) {
  const matches = text.match(pattern);
  console.log("Matches:", matches);
}

Regular Expression Token Breakdown

MD5 hashes are exactly 128 bits represented as 32 hex digits. Each component of the regular expression serves a distinct syntactical purpose as mapped below: