Password Generator – Create Strong Passwords Free Online
Generate cryptographically secure random passwords instantly. Choose your length, character types, and generate up to 10 passwords at once. All passwords are generated server-side using PHP’s CSPRNG — never stored, never logged. Free, no signup, by Chochi.
Customize the options below and click “Generate Password”. Use the copy button to copy any password to your clipboard.
What makes a strong password?
Length is the single most important factor in password strength. Each additional character multiplies the number of possible combinations exponentially. A 12-character password is not twice as hard to crack as a 6-character one — it is trillions of times harder.
Character variety matters alongside length. Using uppercase letters, lowercase letters, numbers, and symbols dramatically increases the pool of possible characters at each position. A password using all four types from a 90+ character pool is far stronger than one using only lowercase letters from 26.
Unpredictability is equally critical. Even a long password is weak if it follows a pattern (like Password123!). This tool uses PHP’s CSPRNG — the same randomness source used for cryptographic keys — so every password is genuinely unpredictable, not just pseudo-random.
How to use the Password Generator
- Set your desired password length (16+ characters recommended for most accounts).
- Choose how many passwords to generate — up to 10 at once gives you options.
- Select which character types to include: uppercase, lowercase, numbers, and symbols.
- Optionally enable “Avoid ambiguous characters” if you need to type the password manually (removes characters like
l,1,O,0that look alike). - Click “Generate Password” to generate your secure random password.
- Click “Copy” next to your chosen password and save it in your password manager.
Password security best practices
Use a different, unique password for every account. If one site is breached and you reuse passwords, attackers try the same credentials everywhere — a technique called credential stuffing. A password manager like Bitwarden (free, open source) or 1Password stores and autofills unique passwords for every site, so you only need to remember one master password.
Enable two-factor authentication (2FA) on every account that supports it. Even if your password is stolen, 2FA adds a second layer an attacker must bypass. Never share passwords via email or chat — use a password manager’s secure sharing feature if you must share access.
Frequently asked questions
How secure are the passwords generated by this tool?
Passwords are generated using PHP’s random_bytes() function, which uses the operating system’s cryptographically secure random number generator (CSPRNG). This is the same level of randomness used for cryptographic keys — far stronger than rand() or mt_rand().
What length should my password be?
For most accounts, 16 characters is the minimum recommended length. Use 20+ characters for sensitive accounts such as banking, email, and admin dashboards. Longer passwords are exponentially harder to crack than shorter ones, even with the same character set.
Should I include symbols in my password?
Yes — adding symbols significantly increases the number of possible combinations (entropy). Most password managers and login systems support symbols. If a site does not allow symbols, compensate by using a longer password with letters and numbers only.
What does “avoid ambiguous characters” mean?
Characters like l (lowercase L), 1 (one), I (uppercase i), O (uppercase o), and 0 (zero) look very similar in some fonts. Enabling this option removes them from the pool, making passwords easier to read and type manually when you cannot paste.
Are my generated passwords stored anywhere?
No. Passwords are generated on the server and sent directly to your browser. They are never logged, stored in a database, or transmitted to any third party. Once you close or refresh the page, the password is gone.
Can I generate multiple passwords at once?
Yes — you can generate up to 10 passwords in one click. This is useful when you want a few options to choose from, or when creating passwords for multiple accounts at once. Each one is independently generated with cryptographic randomness.
How do I use this with a password manager?
Generate a strong password here, then copy it into your password manager (1Password, Bitwarden, LastPass, etc.) when creating or updating a login. Let your password manager remember it — never reuse passwords across sites, even slightly modified versions of the same password.
What is password entropy and why does it matter?
Entropy measures how unpredictable a password is, based on its length and the size of the character pool. Higher entropy means more possible combinations to brute-force. A 16-character password using all character types has around 100 bits of entropy — considered very strong against modern attack hardware.
Need help securing your website?
This free tool is built by Chochi, a web development, performance, and SEO studio. Need help securing your website — not just your passwords? Chochi offers professional security audits and web development services.