Strong Password Generator (Random & Secure)

🔐 Generate Password

Password Strength —

Password Length 16

⚠️ Select at least one character type.

Uppercase LettersA B C … Z

Lowercase Lettersa b c … z

Numbers0 1 2 … 9

Symbols! @ # $ % ^ & *

Exclude Ambiguous0 O l 1 I | ` ~

No Repeating CharsEach character used once

Characters

—

Pool Size

—

Entropy (bits)

—

Est. Crack Time

📋 Bulk Generate

How many passwords?

✏️ Password From Your Text

Type any phrase, sentence, or keywords — the tool transforms your text into a strong password you can actually remember.

Your text / phrase Transformation style

💡 Password Security Tips

🔑 Use a different password for every account. Reusing passwords is the #1 cause of account takeovers.
📏 Longer is stronger. A 20-character password is exponentially harder to crack than a 10-character one.
🗝️ Use a password manager (Bitwarden, 1Password) so you never have to remember complex passwords yourself.
🚫 Never include personal info — birthdays, names, or pet names are guessed first in targeted attacks.
📲 Enable two-factor authentication (2FA) on every account that supports it — it's your second line of defense.
🔄 Change passwords immediately if a service reports a data breach. Check haveibeenpwned.com regularly.

How Strong Is a Random Password?

A password's strength comes from its length and the number of possible characters. With all four character sets on, each character adds about 6.5 bits of entropy, so a 16-character password has about 104 bits, far beyond what any computer can guess. Pick a length, tick the character types, and copy the password.

Password Length vs Strength

With uppercase, lowercase, numbers and symbols (89 possible characters), at 10 billion guesses a second to try every combination:

Length	Entropy	Time to try every combination	Rating in the tool
8	52 bits	about 5 days	Weak
12	78 bits	about 958,000 years	Fair
14	91 bits	about 8 billion years	Strong
16	104 bits	trillions of years	Very Strong

Length does more than symbols: a 16-character password of letters and numbers only (95 bits) is stronger than a 12-character one with symbols (78 bits). Real attack speeds vary widely, so treat crack times as a comparison, not a promise.

How Long Should a Password Be?

Use at least 15 to 16 characters for important accounts; NIST's 2025 digital identity guidelines set 15 characters as the minimum for a password used on its own. Use 20 or more for a password manager's master password. Most important of all, use a different password for every account, so one leak can't unlock the others.

What the Generator Does

Truly random: passwords come from your browser's Web Crypto API (crypto.getRandomValues), not a predictable random function.
Private: everything happens on your device. Passwords aren't sent, stored or logged, and they disappear when you leave the page.
Options: 6 to 128 characters, any mix of character sets, no look-alike characters (0/O, 1/l/I), or no repeated characters.
Bulk: create up to 100 passwords at once, for example when setting up test accounts.

Password From Your Text

This mode turns a phrase you know into a password using leet-speak swaps, initials, scrambling, camel case or an acronym. It's easier to remember, but attackers know these patterns, so it's weaker than a fully random password of the same length. For your most important accounts, use the random generator with a password manager.

Read how to create a strong password and password advice that is actually true. Need other quick utilities? Try the word counter or the unit converter.

How to Use the Password Generator

Set the password length; 16 characters or more is a good default.
Choose which characters to include: uppercase, lowercase, numbers and symbols.
Optionally exclude look-alike characters such as 0 and O, or repeats.
Generate, then copy the password into your password manager. Use Bulk Generate for several at once.

Who Uses the Password Generator?

New accounts: a unique strong password for every site.
IT administrators: bulk-generate temporary passwords for new staff.
Wi-Fi and devices: a long random key for a router or a shared device.

How the Password Generator Saves You Time

Inventing a strong, unique password yourself is slow and people tend to reuse patterns. A random one appears in a click, with its strength estimate.

Frequently Asked Questions

Is this password generator safe to use?

Yes. Passwords are created in your browser with the Web Crypto API, which gives cryptographically secure random numbers, and nothing is sent to a server or stored. The phrase-based mode is a convenience feature and is less secure than the main random generator.

How long should my password be?

At least 15 or 16 characters for email, banking and work accounts, and 20 or more for a password manager's master password. Length adds more strength than symbols do, and a unique password for every account matters as much as length.

What is password entropy?

Entropy measures how unpredictable a password is, in bits. It equals the length multiplied by log₂ of the number of possible characters. Each extra bit doubles the guesses needed. In this tool, 80 to 99 bits rates as Strong and 100 bits or more as Very Strong.

How is the crack time worked out?

The tool assumes an attacker tries 10 billion guesses a second and must try every possible combination. That's a simple, fixed benchmark for comparing passwords. Real speeds depend on how a website stores passwords, so the figure is a guide, not a guarantee.

Why exclude ambiguous characters?

Characters such as 0 and O, or 1, l and I, look alike in many fonts. Excluding them makes a password easier to read and type by hand, for example on a TV or a shared computer. It reduces the character pool slightly, so add one or two characters to compensate.

Does this tool store my passwords?

No. The tool runs entirely in your browser, and generated passwords are never sent, saved or logged. When you close or refresh the page, they are gone. Save the ones you use in a password manager straight away.

Can it create a password I can remember?

Yes. The Password From Your Text section turns a phrase you know into a password with numbers and symbols. It's easier to remember but more predictable than a random password, so use it for less critical accounts and keep random passwords for email and banking.

Last updated: September 2026

🔐 Strong Password Generator