Password Generator – Free Strong Password Tool
Generate cryptographically secure random passwords with custom length and character sets. Bulk generation, strength meter and one-click copy included.
What Is the Password Generator?
The Password Generator is a free, client-side tool that creates cryptographically strong random passwords instantly in your browser. Choose length, character sets (uppercase, lowercase, numbers, symbols), exclude ambiguous characters, and generate single or bulk lists — without any data ever leaving your device.
Uses the browser's crypto.getRandomValues() API — the same CSPRNG used by security software.
Control length (4–128 chars), character types, no-repeat and no-ambiguous options.
Generate up to 100 passwords in one click and copy all at once — perfect for provisioning accounts.
All generation happens in your browser. No password is ever transmitted to any server.
How to Use
Set Password Length
Drag the slider or type a number to set how long you want your password — anywhere from 4 to 128 characters. Longer passwords are exponentially harder to crack.
Choose Character Sets
Tick the character types to include: uppercase (A–Z), lowercase (a–z), numbers (0–9) and symbols (!@#$…). More variety means higher entropy.
Fine-Tune Options
Enable "No Ambiguous Characters" to exclude look-alike chars like O/0 and I/l/1 — great for temporary passwords that users type by hand.
Generate & Copy
Click Generate, then Copy to grab your password. For multiple passwords, enter a count and use Copy All to get them all at once.
Frequently Asked Questions
Security experts recommend at least 16 characters for most accounts, and 20+ for high-value accounts such as email, banking or password managers. Length is the single biggest factor in password strength.
Yes. The tool uses window.crypto.getRandomValues(), a cryptographically secure pseudo-random number generator (CSPRNG) built into all modern browsers. This is far stronger than Math.random() and is the same entropy source used by security applications.
No. Generation runs entirely in your browser using JavaScript. No password is ever sent to a server, stored in a database, or logged anywhere. You can even disconnect from the internet and the tool will still work.
Absolutely. A password manager lets you use a different strong password for every site without needing to memorise them. This tool is perfect for generating those passwords — then save them in your manager of choice.
The strength meter estimates the password's entropy in bits — calculated from length × log₂(charset size). A green "Strong" rating means the password has enough entropy to resist brute-force attacks for a practically unlimited time.
Ambiguous characters are visually similar characters: O (letter) vs 0 (zero), I (capital i) vs l (lowercase L) vs 1 (one). Excluding them reduces transcription errors when sharing a temporary password verbally or writing it on paper.
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