Password Generator
Generate cryptographically random, strong passwords instantly
What is Password Generator?
Password security is the first line of defence for every account, service, and API you interact with. Weak or reused passwords are the leading cause of account compromise — and yet generating a truly random, sufficiently long password by hand is practically impossible for humans. Our free Password Generator creates cryptographically strong passwords using your browser's crypto.getRandomValues() API — the same source of randomness used by operating systems and security software. You control the length (from 8 to 128 characters) and which character sets to include: uppercase letters, lowercase letters, numbers, and special symbols. The tool can also generate multiple passwords at once for situations where you need a batch of credentials — provisioning developer accounts, generating API secrets, or creating test user passwords. Every password is generated locally in your browser; nothing is ever transmitted to any server or stored in any log. Use the generated passwords directly with a password manager like Bitwarden, 1Password, or LastPass, which will store them securely so you never need to remember them.
How to Use Password Generator
- 1
Set Your Requirements
Choose the password length (12–16 characters is a good default for most accounts; 32+ for API keys and secrets). Toggle which character sets to include: uppercase, lowercase, numbers, and symbols.
- 2
Generate
Click Generate to produce one or more passwords using crypto.getRandomValues() — a cryptographically secure random number generator built into every modern browser.
- 3
Copy and Save in a Password Manager
Copy the generated password and immediately save it in a password manager. Never store passwords in plain text files, spreadsheets, or browser autofill without proper management.
Use Cases
Creating Secure Passwords for New Accounts
Every new account should have a unique password that is not reused from any other site. Generate a 16–20 character password here with mixed character types, copy it directly into your password manager's new entry form, and you will never need to remember it or reuse a weak one again.
Generating API Keys and Application Secrets
Application secrets, webhook signing keys, and internal API tokens need to be long, random strings that are impossible to guess. Generate a 32 or 64-character alphanumeric secret here for use as a JWT signing key, encryption seed, or service-to-service authentication token.
Provisioning Developer and Test Accounts
When setting up staging environments, CI/CD service accounts, or demo accounts for client presentations, you need batches of secure passwords that are not reused across environments. Generate a set here, record them in your team's secrets manager, and keep staging credentials completely isolated from production.
Features
Cryptographically Secure Randomness
Uses crypto.getRandomValues() — not Math.random() which is predictable — ensuring passwords are genuinely unpredictable and resistant to pattern analysis.
Customisable Length and Character Sets
Set length from 8 to 128 characters. Toggle uppercase (A–Z), lowercase (a–z), numbers (0–9), and special symbols independently to match any site's password policy.
Password Strength Indicator
Shows the estimated strength of the generated password based on length and character set diversity — from weak to very strong.
Bulk Generation
Generate multiple passwords at once for provisioning multiple accounts, creating test fixtures, or generating a set of API keys.
Never Stored or Transmitted
Generated passwords exist only in your browser tab. Nothing is logged, sent to a server, or persisted anywhere.
Frequently Asked Questions
For standard accounts (email, social media, shopping): 16 characters minimum. For financial accounts and admin panels: 20+ characters. For application secrets and API keys: 32–64 characters. Length is the single biggest factor in password strength — each additional character multiplies the number of possible combinations exponentially.
Yes, when using crypto.getRandomValues() as this tool does. This API draws from the operating system's entropy pool (the same source used by cryptographic libraries like OpenSSL). The key concern is never storing the password in the page, in localStorage, or in browser history — this tool generates and displays it only, leaving storage entirely to you.
Yes, if the site allows them. Including symbols like !@#$%^&* significantly expands the character set from 62 (letters + numbers) to 95+ characters, making brute-force attacks orders of magnitude harder. Some sites restrict which symbols are allowed — generate a password here with symbols and remove any that the site rejects, then regenerate if needed.
A strong password is a random string of mixed characters (e.g., X7!mK9@pLq3#). A passphrase is a sequence of random words (e.g., correct-horse-battery-staple). Passphrases are easier to remember and, when long enough, equally or more secure. For machine-generated passwords stored in a password manager, random character strings are preferred. For passwords you need to type manually or memorise, passphrases are often better.
The human brain cannot generate or recall truly random strings. People inevitably create patterns, reuse passwords, or use personal information — all of which make passwords guessable. A password manager generates, stores, and autofills unique random passwords for every site, so you only need to remember one strong master password. Popular options include Bitwarden (free, open source), 1Password, and LastPass.
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