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Strong PasswordRegex — Pattern, Examples & Code

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]).{8,}$

What it matches / doesn't match

Matches ✅Does not match ❌
●Secure@123●password
●P@ssw0rd!●PASSWORD1
●MyStr0ng#Pass●Short1!

How it works

Uses four lookaheads to require at least one lowercase letter, one uppercase letter, one digit, and one special character from a common set. The final .{8,} enforces a minimum length of 8 characters. Adjust the special character class or minimum length to match your security policy.

Code Usage

JavaScript

const regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=]).{8,}$/;
regex.test("Secure@123"); // true

Python

import re
pattern = re.compile(r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=]).{8,}$')
bool(pattern.match("Secure@123"))  # True

Go

import "regexp"
// Go RE2 does not support lookaheads — validate each rule separately:
r1 := regexp.MustCompile(`[a-z]`)
r2 := regexp.MustCompile(`[A-Z]`)
r3 := regexp.MustCompile(`\d`)
r4 := regexp.MustCompile(`[!@#$%^&*]`)
valid := len(pw) >= 8 && r1.MatchString(pw) && r2.MatchString(pw) && r3.MatchString(pw) && r4.MatchString(pw)

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FAQ

What does the Strong Password regex pattern match?

Uses four lookaheads to require at least one lowercase letter, one uppercase letter, one digit, and one special character from a common set. The final .{8,} enforces a minimum length of 8 characters. Adjust the special character class or minimum length to match your security policy.

How do I use the Strong Password regex in JavaScript?

const regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=]).{8,}$/; regex.test("Secure@123"); // true

Can I use the Strong Password regex in Python?

Yes. import re pattern = re.compile(r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=]).{8,}$') bool(pattern.match("Secure@123")) # True