Password Generator
Generate strong, secure random passwords using cryptographic randomness. Customize length, character types, and generate in bulk.
How to Use the Password Generator
- Set length -- Use the slider to pick a password length between 8 and 128 characters. Longer passwords are more secure.
- Choose character types -- Toggle uppercase, lowercase, numbers, and symbols. Enable at least one type.
- Exclude ambiguous characters -- Check this option to remove visually similar characters (0, O, I, l, 1) for easier reading.
- Generate -- Click the button or change any option to auto-generate. Use the batch dropdown to create multiple passwords at once.
- Copy -- Click Copy to send the password(s) to your clipboard instantly.
About Strong Passwords
A strong password is one of the most important defences for your online accounts. This generator uses the Web Crypto API (crypto.getRandomValues()) to produce cryptographically secure randomness, ensuring that every password is truly unpredictable. Unlike pseudo-random generators, cryptographic randomness is suitable for security-sensitive applications.
Security experts recommend passwords of at least 12 characters mixing all four character types. Avoid reusing passwords across sites, and consider using a password manager to store them safely. This tool runs entirely in your browser -- no passwords are transmitted over the network or stored on any server.
Use Cases for Strong Passwords
Strong, unique passwords are essential across every area of your digital life. Here are the most common scenarios where a password generator like this one proves invaluable.
Personal Accounts
Email, social media, streaming services, and online shopping accounts are frequent targets for credential-stuffing attacks. Generating a unique random password for each personal account ensures that a breach on one service does not compromise the others. With hundreds of online accounts per person on average, reusing passwords is the single biggest security risk most people face.
Work and Enterprise Accounts
Corporate email, VPNs, SaaS dashboards, and cloud consoles demand strong credentials. Many organisations enforce minimum password policies (length, complexity, rotation), and a generator helps you meet those requirements effortlessly. Using unique passwords for each work system also limits the blast radius of a compromised credential.
Wi-Fi and Network Passwords
Your home or office Wi-Fi password protects every device on the network. A long, random password with the "exclude ambiguous characters" option enabled is easy to read aloud or print on a card for guests, while remaining virtually impossible to brute-force.
API Keys and Tokens
When services require you to create your own API secret or webhook token, a generated password provides high-entropy randomness. Use a longer length (32-64 characters) for these machine-to-machine credentials since they never need to be memorised.
Database and Server Credentials
Database root passwords, SSH passphrases, and admin panel logins are high-value targets. Generating unique, strong passwords for each server and storing them in a password manager is a fundamental best practice in system administration.
Temporary and One-Time Passwords
Need a throwaway password for a quick signup or a temporary shared account? Generate one here without reusing a password you care about. Once the temporary need ends, the password can be discarded without risk.
Password Strength Reference
Password strength depends primarily on length and the size of the character set used. The table below shows approximate entropy and estimated brute-force crack times for different configurations, assuming an attacker capable of 10 billion guesses per second (a realistic estimate for offline attacks against fast hashes).
| Length | Character Set | Entropy (bits) | Crack Time (10B/sec) |
|---|---|---|---|
| 8 | Lowercase only (26) | ~38 | ~21 seconds |
| 8 | All types (95) | ~53 | ~2.6 hours |
| 12 | All types (95) | ~79 | ~19 million years |
| 16 | All types (95) | ~105 | ~1.2 trillion years |
| 20 | All types (95) | ~131 | ~8.6 x 10^25 years |
As the table illustrates, increasing password length provides far greater security improvements than simply adding more character types to a short password. A 16-character password with all character types is effectively uncrackable by brute force with current and foreseeable technology.
Security Best Practices
Generating a strong password is only the first step. How you manage and use that password matters just as much. Never reuse the same password across multiple sites or services. Data breaches happen regularly, and attackers routinely test stolen credentials against other platforms -- a technique known as credential stuffing. A unique password per account limits the damage to a single service.
Store your passwords in a reputable password manager rather than in a text file, browser autofill, or sticky note. Password managers encrypt your vault with a master password and can auto-fill login forms, reducing the temptation to use simple, memorable passwords. Popular options include Bitwarden (free and open-source), 1Password, and KeePass.
Enable two-factor authentication (2FA) wherever possible, especially for email, banking, and cloud services. Even the strongest password can be compromised through phishing, keyloggers, or server-side breaches. A second factor -- such as a TOTP code from an authenticator app or a hardware security key -- provides an additional layer of defence that remains effective even if your password is stolen.
Frequently Asked Questions
This generator uses the Web Crypto API (crypto.getRandomValues()) to produce cryptographically secure random values. These values are mapped to your selected character set to build each password. Everything runs in your browser -- nothing is sent to a server.
A strong password is at least 12 characters long and uses a mix of uppercase letters, lowercase letters, numbers, and special symbols. It should not contain dictionary words, personal information, or common patterns like "123456" or "qwerty".
Yes. All passwords are generated entirely in your browser using cryptographic randomness. No data is sent to any server, no passwords are logged, and nothing is stored. You can even use this tool offline.
Yes. Use the batch dropdown to select 5, 10, or 20 passwords. They will all be generated with the same settings and displayed in a text area for easy copying.
Security experts recommend at least 12 characters for general accounts and 16 or more characters for sensitive accounts like banking or email. Longer passwords exponentially increase the time required for brute-force attacks. A 16-character password with all character types provides approximately 105 bits of entropy.
Yes. A password manager lets you use unique, strong passwords for every account without memorising them. Popular options include Bitwarden (free and open-source), 1Password, and KeePass. This generator pairs perfectly with any password manager -- generate here, paste into your vault.
Ambiguous characters like 0 (zero) and O (letter O), or 1 (one) and l (lowercase L), look very similar in many fonts. Excluding them makes passwords easier to read and transcribe manually, such as when sharing a Wi-Fi password verbally or printing it on a card.
Both can be secure. Random passwords offer maximum entropy per character, while passphrases (random words strung together) are easier to remember. A 4-word passphrase typically provides around 44 bits of entropy, while a 16-character random password with all character types provides about 105 bits. For accounts where you rely on a password manager, random passwords are generally the better choice.
Password entropy measures the unpredictability of a password in bits. Higher entropy means the password is harder to crack. It is calculated as log2(charset_size^length). For example, a 16-character password drawn from 95 printable ASCII characters has about 105 bits of entropy, making it effectively uncrackable by brute force.