Length is mathematically far more important than complexity.
A 16-character phrase made of normal dictionary words is exponentially
harder for a computer to crack than a short 8-character password
packed with random symbols.
What is Password Entropy?
Entropy is a scientific measurement of how unpredictable your password is,
calculated in "bits." Every time you add a character or expand the character
pool (mixing lowercase, uppercase, numbers, and symbols), the search space
multiplies. An entropy score above 60-70 bits is generally considered
highly secure against modern hardware.
Online vs. Offline GPU Attacks
Online attacks happen when a bot tries guessing your password
directly on a website's login screen. These are slow because servers enforce
rate limits and lockouts.
Offline GPU attacks occur after a data breach. Attackers steal
password hashes from a company's database, then use powerful hardware to guess
huge numbers of combinations locally until they find a match.
Is this password checker safe?
Yes. This tool runs entirely locally using WebAssembly (WASM). Your keystrokes
are processed by your browser and are never sent over the internet to any server.
You could disconnect from Wi-Fi and it would still work.
