Password & Passphrase Generator

How to Use

1. Choose a password type: Random Characters or Passphrase (3-6 words)
2. For Random Characters, set length and choose character types
3. For Passphrase, set word count (3-6) and minimum word length
4. Click "Generate Password" and then "Copy to Clipboard"

Features

• Secure: All passwords are generated locally in your browser - nothing is sent to our servers
• Customizable: Choose length from 8 to 64 characters
• Flexible: Include or exclude uppercase, lowercase, numbers, and symbols
• Strength Indicator: Visual feedback on password strength
• Free: No registration or payment required

Password Security Tips

• Use a unique password for each account
• Make passwords at least 12 characters long
• Include a mix of uppercase, lowercase, numbers, and symbols
• Avoid using personal information in passwords
• Consider using a password manager to store your passwords
• Enable two-factor authentication when available

Evidence-Based Password Guidance

NIST SP 800-63B recommends focusing on password length, blocking commonly used or breached passwords, and rate limiting login attempts.

Practical best practice is to create long passphrases, use a password manager, and enable multi-factor authentication.

Why This Tool Helps

• Random generation reduces predictable human patterns.
• Custom length lets you meet modern minimum requirements.
• Client-side generation means passwords are created in your browser.

Random Passwords vs Passphrases

Random character passwords are usually the best choice when a site allows password managers and long credentials. They are hard to predict because they avoid human habits such as replacing letters with numbers, reusing favorite words, or following the same pattern across many accounts.

Passphrases can be easier to read, type, and verify when you must enter a password manually on a phone, television, kiosk, or other device where pasting from a password manager is inconvenient. The tradeoff is that passphrases should still be unique and long enough to resist guessing, especially if they are protecting important accounts.

Passphrases: Strong, Memorable, Word-Based Passwords

This tool doesn't only generate random-character passwords. Switch Password Type to Passphrase to build a memorable password out of several random words instead of a jumble of characters.

What Is a Passphrase?

A passphrase is a password made of multiple random words strung together - typically three or more - rather than a short string of random letters, numbers, and symbols. Because passphrases are built from ordinary words, they are often much easier to read, remember, and type accurately than a password like T9!qL2#zXk, while still being long enough to resist automated guessing.

Why the NCSC Recommends Three Random Words

The UK's National Cyber Security Centre (NCSC) recommends building passwords by combining three random, unrelated words. Their reasoning is that people struggle to remember and accurately type long strings of mixed-case letters, numbers, and symbols, which pushes many people toward short, predictable passwords or password reuse. Three unrelated words, chosen at random rather than taken from a personally meaningful phrase, give you a password that is both long enough to be hard to crack and simple enough to actually remember and type without mistakes.

The "Correct Horse Battery Staple" Idea

The webcomic XKCD popularized this same idea in a well-known comic comparing a short, complex-looking password to a longer passphrase made of a few common words, using the example "correct horse battery staple". The comic's point is that adding length through extra random words increases the number of possible combinations - and therefore the difficulty of guessing - far more than adding a bit more complexity to a short password, while remaining easier for a person to recall.

The Tradeoff: Length and Entropy vs. Memorability

Password strength ultimately comes down to entropy: roughly, how many possible combinations an attacker would have to try before guessing correctly. Cramming more character types into a short password does increase entropy, but only up to a point, and the result is often hard to remember, so people write it down or reuse it. A passphrase reaches high entropy mainly through length - each extra random word multiplies the number of possible passphrases, so a four- or five-word passphrase drawn from a large word list can be far harder to crack than a short complex password, while staying easier to memorize.

Using Passphrase Mode in This Tool

Select Passphrase from the Password Type dropdown, then use the Passphrase Word Count slider to choose between three and six words, and the Minimum Word Length slider to require longer, less-guessable words. Words are chosen at random from a built-in word list and joined with hyphens. Prefer passphrase mode when you need to type a password by hand - on a phone, a smart TV, or a shared kiosk where pasting from a password manager is impractical - and reach for random-character mode when a site enforces strict composition rules or you'll always be copying and pasting from a password manager anyway. See our Password Security Guide for broader guidance on storing and managing passwords safely.

A Short Note on Entropy

For a passphrase, strength depends on two things: how many words it has and how large the pool of possible words is. Each extra word multiplies the number of possible combinations, and a larger word list does the same, so a five-word passphrase drawn from thousands of possible words can have more entropy than a short random password, even though it's built entirely out of ordinary words. If you're curious how services store passwords securely rather than in plain text, our Hash Generator demonstrates the kind of one-way hashing used to protect stored credentials.

Frequently Asked Questions

What is a passphrase?

A passphrase is a password built from multiple random words instead of a random string of characters - for example, several unrelated dictionary words strung together. Passphrases are designed to be long enough to resist guessing while remaining easier for a person to remember and type than a short password packed with symbols and mixed case.

Are passphrases more secure than passwords?

A sufficiently long, randomly generated passphrase can be as secure as, or more secure than, a short complex password, because its strength comes mainly from length rather than character variety - and length is what drives up the number of combinations an attacker must try. A passphrase isn't automatically secure just because it uses words, though: it still needs to be random (not a quote, song lyric, or predictable phrase) and long enough for the account it protects.

How many words should a passphrase have?

The UK's National Cyber Security Centre recommends at least three random words as a practical minimum for everyday accounts. For higher-value accounts, or whenever a site allows longer input, four to six random words gives a meaningful boost in strength. This tool's passphrase mode lets you choose anywhere from three to six words.

Is a three-word password safe?

Three truly random, unrelated words can be a reasonable password for many everyday accounts, especially compared with a short, predictable password - which is the basis for the NCSC's three-random-words guidance. For your most sensitive accounts, such as email, banking, or a password manager, consider using more words, a longer minimum word length, or pairing the passphrase with multi-factor authentication.

Common Password Mistakes to Avoid

A strong-looking password can still be low quality if it is reused. Reuse is one of the biggest real-world risks because a leak from one site often becomes a credential-stuffing attack against many other services. A password that is unique to one account limits the damage when a breach happens somewhere else.

Another common mistake is making only cosmetic changes to an old password, such as adding an exclamation mark or changing the year. Attackers and cracking tools test those predictable variations first. When you need a new password, generate a genuinely new one instead of editing an old favorite.

How to Use This Tool in a Safer Workflow

A practical workflow is to generate a password here, save it immediately in a reputable password manager, and then let the manager fill it when you return to that account. That reduces the chance of falling back to memorable but weak passwords and helps you keep unique credentials everywhere.

For higher-risk accounts such as email, banking, developer platforms, and cloud dashboards, pair a strong password with multi-factor authentication. Password strength matters, but account recovery settings, MFA, and monitoring for breach alerts also matter because security is a system rather than a single field on a signup form.

What This Tool Does and Does Not Do

This generator helps you create stronger candidate passwords and passphrases, but it does not verify a website's storage practices, account lockout policy, or support for phishing-resistant authentication. A good password is useful only when the service around it is also managed responsibly.

It also does not check whether a generated password appears in a breach corpus. If you want to go further, use a password manager that warns about reused or compromised credentials and review security alerts from the services you rely on most.

References

• NIST SP 800-63B: Digital Identity Guidelines
• NIST SP 800-63-4 (current revision family)

Password Security Guide

Want a deeper explanation of password history, practical security guidance, and how strength affects risk? Read our Password Security Guide.