Secure Password Generator
Generate cryptographically strong random passwords. Customizable length (4-128 chars), character sets, bulk generation. Instant, offline, no tracking.
How to Use — 3 Simple Steps
Set options
Choose length (4–128) and which character sets: uppercase, lowercase, numbers, symbols.
Generate
Click 'Regenerate' or adjust any setting — a new password generates instantly.
Copy & use
Copy to clipboard and save in your password manager immediately.
Why Use SiteConversor?
Cryptographically Secure
Uses Web Crypto API (crypto.getRandomValues) — the same randomness standard as security software.
Never Transmitted
Passwords are generated locally and never sent to any server — zero interception risk.
Fully Customizable
Control length (4–128), character sets, and exclude ambiguous characters (0, O, l, 1).
Bulk Generation
Generate up to 50 passwords at once for batch account creation or security audits.
About This Tool
Weak passwords remain the leading cause of account compromises. 'Password123' and similar choices are cracked by modern tools in seconds. A truly random, long password is mathematically unguessable — a 20-character random password would take longer to crack than the current age of the universe.
SiteConversor's generator uses window.crypto.getRandomValues() — the browser's cryptographically secure random number generator, powered by hardware entropy sources (thermal noise, timing variations, physical phenomena that are fundamentally unpredictable). This is not Math.random(), which is predictable and unsuitable for security.
Excluding ambiguous characters (0/O/l/1) makes passwords easier to type manually without significantly reducing security. Increasing length is always the most effective security improvement — each additional character exponentially increases possible combinations.
Every security professional recommends a different random password for every account. The only practical way is a password manager. Generate here, copy, save in Bitwarden or 1Password. Unique, random passwords + password manager is the current gold standard.
Frequently Asked Questions
How secure are the generated passwords? expand_more
Very secure. We use window.crypto.getRandomValues() — the Web Crypto API's CSPRNG. A 16-character password with all character sets has ~4.4 × 10^31 possible combinations — effectively unguessable.
What length should I use? expand_more
16 characters for general accounts. 20–24+ for high-security accounts (email, banking, password manager). NIST recommends prioritizing length — a 20-character passphrase is stronger than a 10-character symbol password.
Should I use symbols? expand_more
Symbols increase entropy, but some services restrict certain symbols. If restricted, use a longer password with uppercase, lowercase, and numbers to compensate.
Where should I store passwords? expand_more
Always in a reputable password manager: Bitwarden (open source, free), 1Password, Dashlane, or your browser's manager. Never in plain text files or email.
Are passwords saved anywhere? expand_more
No. Generated entirely in browser JavaScript, displayed on screen, and never transmitted. When you close the page, the password is gone — copy to your manager immediately.
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