Why the entropy number is approximate
The estimate uses length × log₂(pool size). Requiring at least one character from each selected set changes the exact distribution slightly.
TechFinity toolkit
Password Generator
Generate cryptographically secure random passwords with explicit character rules, readable filters, and strength estimates.
Generated output
One password per line.
Use a password manager
Unique random credentials are most useful when a password manager can store them, rather than when a person must memorize or reuse them.
Server-side randomness
Generation uses PHP random_int(), backed by the operating system’s cryptographically secure random source.