Cryptographic randomness
Use the operating system's secure random source rather than `Math.random()`.
Local cryptographic password generator
Generate a password or passphrase with Web Crypto.
Create independent secrets from the browser's cryptographic random source, with no copy sent to a server or saved in history.
Use the free toolRuns in this browser
password generator
Choose random characters for maximum density or random words for easier manual entry. Entropy is an estimate based on the selected generator, not a guarantee against compromise.
Result
The jobs this tool completes
Built around the failure points.
Password and passphrase modes
Balance dense machine-entered secrets with memorable multi-word options.
Transparent constraints
See the alphabet size, word-list size, and estimated generator entropy for the exact settings.
Workflow
From input to an auditable output.
- Choose random password or passphrase mode and set the relevant length.
- Select allowed character groups, separator, and ambiguity behavior.
- Generate independent options, copy one directly, and place it into a trusted password manager.
Learn the details
Use the result with fewer surprises.
Guide
Password vs passphrase: choose for the workflow
Compare randomly generated character passwords and multi-word passphrases by entropy, usability, and system constraints.
Read guide →GuideHow generated-password entropy is estimated
Understand the assumptions behind generator entropy and why an estimate is not a breach-time promise.
Read guide →Common questions
What this tool does—and does not do.
Cryptographic randomness
Use the operating system's secure random source rather than `Math.random()`.
Password and passphrase modes
Balance dense machine-entered secrets with memorable multi-word options.
Transparent constraints
See the alphabet size, word-list size, and estimated generator entropy for the exact settings.
Does this guarantee the result will be accepted elsewhere?
No. The tool completes and explains its calculation or transformation, but another platform can apply different limits, rules, encoders, or policies. Verify consequential output in the destination.
Ready
Generate secrets
Return to the tool with your inputs still in this tab.