Password Generator
Generate strong, secure, customizable passwords with entropy analysis — all in your browser.
Last updated: May 10, 2026
Password Generator
A powerful client-side Password Generator that creates cryptographically strong passwords based on your exact requirements. Configure length, uppercase, lowercase, numbers, and symbols. View the live strength meter and entropy score to understand how secure your password is. Generate multiple passwords at once for batch use, and copy or download results instantly — no server, no logging, no risk. The strength meter converts length and character-set choices into a real entropy number — length times the base-2 log of the character pool — and color-codes it from Very Weak under 28 bits up to Very Strong at 80 bits and beyond. Ambiguous characters like 0, O, 1, l, I, and | can be excluded from the pool, and a 500-row bulk generator creates a whole batch at once. Everything runs in this tab, so results only ever live in your clipboard or download.
Why This Tool Exists
What makes this useful — and why I built it this way.
Secure: Uses browser crypto API for true randomness.
Fully Customizable: Match any site's password policy.
No Data Risk: Passwords are never sent to any server.
Policy Matching: Length, charsets, and ambiguity rules can be tuned to satisfy any website's password policy.
When You'd Use This
Real situations where this tool saves the day.
Creating account passwords for websites and apps.
Generating API keys or secret tokens.
Batch-creating passwords for team or user provisioning.
Audited Accounts: Create unique, high-entropy passwords for accounts covered by credential-stuffing breach reports.
Using Password Generator
It's straightforward — here's how it works.
Set your desired password length.
Toggle the character sets you want (uppercase, numbers, symbols, etc.).
Click 'Generate' to create your password.
Check the strength meter and entropy to evaluate security.
Use 'Copy' or 'Download' to export your passwords.
Questions People Ask
Honest answers about how this works.
Is this truly random?
Yes, it uses the browser's Web Crypto API (crypto.getRandomValues) for cryptographically secure randomness.
Are generated passwords stored anywhere?
No. Everything is generated and stays in your browser's memory. Nothing is logged or transmitted.
How much entropy should I aim for?
For online accounts, above 60 bits beats human-generated passwords and automated guessing; at the default 16 characters with the symbol set off, the tool produces about 95 bits, which is comfortably in the Very Strong range. Even where a site caps length, use 12+ characters and every character type you can include.
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