Free Password Generator
Three generation modes in one tool: classic random, themed memorable, and passphrase. Bulk generate up to 10 passwords at once, check real entropy and estimated crack time, and copy with one click. Everything runs in your browser — nothing is ever transmitted.
More Than a Slider and a Button
A password generator designed around how people actually use passwords — not just how security textbooks say they should.
Classic Random
Traditional cryptographically random passwords using uppercase, lowercase, numbers, and symbols. Full control over length and which character sets to include.
Memorable Passwords
Themed word combinations like PurpleTiger#47 or CrimsonDragon!9. Strong enough to be secure, natural enough to actually remember. Choose from Nature, Tech, Fantasy, or Food vibes.
Passphrase Mode
Four or five random words joined by separators, like lamp-tiger-cloud-seven. Passphrases are statistically stronger than most random passwords and far easier to memorise.
Bulk Generation
Generate up to 10 passwords at once and pick your favourite. Each one is independently random, so you get real variety rather than minor variations of the same pattern.
Strength Analyser
Each password comes with a real-time strength score, entropy measurement in bits, and an estimated crack time based on brute-force attack speeds at modern hardware rates.
One-Click Copy
Click any password to copy it to your clipboard instantly. A visual confirmation appears so you always know the copy was successful before closing the tab.
100% Private
All generation uses the browser's built-in cryptographic random number generator (crypto.getRandomValues). Nothing is sent to any server. Your passwords exist only on your device.
4 Themed Vibes
Memorable mode offers Nature, Tech, Fantasy, and Food word banks. Each vibe produces passwords with a distinct character that makes them easier to associate with a specific account.
Entropy Display
See the exact bits of entropy for every password you generate. This gives you an objective, mathematical measure of strength rather than a vague colour bar.
Who Uses This Generator?
Different people need different kinds of passwords. This tool handles all of them.
Personal Accounts
Use memorable mode for accounts you type manually, and classic mode for everything stored in a password manager.
Work Credentials
Generate compliant passwords that meet IT policy requirements for length, complexity, and character variety in one click.
Developers
Quickly generate API keys, secrets, seed values, and test credentials without leaving your browser.
Families
Use passphrase mode to create passwords that older family members can actually remember and type without frustration.
Frequently Asked Questions
What makes a password strong?
Password strength comes from two factors: length and character variety. A longer password from a larger character set takes exponentially longer to crack by brute force. A 16-character password using all character types has approximately 99 bits of entropy, which would take billions of years to crack even with dedicated hardware. Length matters more than complexity — a 20-character lowercase password is stronger than a 10-character mixed-case password.
Are passphrases really more secure than random passwords?
Yes, when they are long enough. A four-word passphrase drawn from a list of 7,776 words (like the EFF wordlist) has about 51 bits of entropy. A five-word passphrase has 64 bits. This is comparable to a 12-character random password, but far easier to remember and type. The key is that the words must be genuinely random — not chosen by you — which is exactly what this generator does.
Is my password sent to a server?
No. All generation happens entirely in your browser using the Web Cryptography API (crypto.getRandomValues), which is a cryptographically secure random number generator built into every modern browser. No password, no keypress, and no result is ever transmitted to any server. You can verify this by turning off your internet after the page loads — the tool continues to work perfectly.
What is entropy and why does it matter?
Entropy is a measure of randomness, expressed in bits. Each bit of entropy doubles the number of possible passwords an attacker must try. A password with 64 bits of entropy requires 2⁴² attempts on average to crack by brute force. Modern GPUs can attempt billions of hashes per second against offline databases, so 80+ bits of entropy is recommended for sensitive accounts. This tool displays entropy so you have a real number rather than a vague strength label.
Should I use a password manager?
Yes, absolutely. A password manager lets you use a unique, fully random password for every account without having to remember any of them. You only need to remember one strong master password. The most secure approach is to use this generator to create unique passwords for each account, then store them in a reputable password manager.
What does the crack time estimate mean?
The crack time is an estimate of how long it would take an attacker to guess your password using a brute-force attack at 10 billion attempts per second, which represents dedicated offline cracking hardware. Online attacks against live services are rate-limited and far slower. The estimate assumes the attacker knows nothing about your password except its character set.
Which mode should I use?
Use Classic mode for passwords that go directly into a password manager — you never need to type them, so memorability doesn't matter. Use Memorable mode for passwords you type regularly, like your device login or password manager master password. Use Passphrase mode for any password where you need maximum security combined with the ability to remember and type it accurately.
How often should I change my passwords?
Current security guidance (NIST 2024) recommends against mandatory periodic password changes unless there is evidence of compromise. Changing passwords frequently often leads to weaker passwords as people use predictable patterns. A better approach is to use a unique, strong password for every account and change it only if you suspect that account has been breached.
Password Security in 2025: What Actually Matters
Password security advice has changed significantly over the past decade. The old guidance — change your password every 90 days, use a mix of uppercase and special characters, make it at least 8 characters — has been largely revised by NIST (the National Institute of Standards and Technology) and other bodies based on how attacks actually work in practice. Understanding the current thinking helps you make better decisions about your own passwords.
Length Is the Most Important Factor
The single most impactful thing you can do is use longer passwords. Each additional character multiplies the time required to brute-force the password by the size of the character set. A 12-character password using all character types is not twice as strong as a 6-character one — it is trillions of times stronger. Modern guidance recommends a minimum of 12 characters for general accounts and 16 or more for sensitive ones like banking or email. Password managers make this trivial because you never have to type the password — you can use 32 random characters without any inconvenience.
Why Passphrases Are Underrated
A passphrase is a sequence of random words used as a password. The concept was popularised by the Diceware method and later by the EFF (Electronic Frontier Foundation), which published a curated wordlist optimised for memorability. A five-word passphrase from a list of 7,776 words has approximately 64 bits of entropy, which is equivalent to a 12-character fully random password but dramatically easier to remember and type accurately. The critical requirement is randomness — the words must be selected by a random process, not chosen by you, because human word selection is highly predictable and destroys most of the security benefit.
Passphrases are particularly well-suited for master passwords of password managers, device login passwords, and any credential you need to type from memory regularly. The combination of genuine randomness and natural language structure makes them both secure and human-friendly in a way that strings of random characters simply are not.
The Case for Unique Passwords Everywhere
Password reuse is one of the most common and consequential security mistakes. When a service is breached and its password database is leaked — which happens thousands of times per year — attackers run the stolen credentials against hundreds of other services automatically. This is called credential stuffing, and it is highly effective precisely because so many people reuse passwords. A single data breach at a low-security forum can lead directly to the compromise of your bank account if you used the same password for both.
The solution is simple in principle but difficult in practice without a tool: use a unique, randomly generated password for every single account. This is only practical with a password manager. With a password manager, you memorise one strong master password and it handles the rest. This is the most impactful single change most people can make to their digital security.
How This Generator Ensures True Randomness
This tool uses the Web Cryptography API built into every modern browser, specifically crypto.getRandomValues(), which provides cryptographically secure random numbers suitable for security-sensitive applications. This is the same standard used by professional security tools. It is fundamentally different from the Math.random() function used in most JavaScript code, which is not cryptographically secure and should never be used to generate passwords or cryptographic keys. Because all generation happens locally in your browser with no server communication, your passwords are never exposed to any network, log, or third-party system.