Security & Entropy Analyzer

Password Strength Checker & Analyzer

Calculate password entropy in bits, audit dictionary flaws, and estimate realistic brute-force crack times across GPU clusters and supercomputers.

100% Client-Side Privacy:
• Passwords never leave your computer
• Zero network requests, analytics, or storage
• Cryptographic entropy & crack time modeling

Enter Password to Test

Strength RatingVery Strong
Entropy: 105 bitsLength: 16 characters

Security Requirements Audit

  • Minimum 12 characters length16/12
  • Lowercase letters (a-z)Included
  • Uppercase letters (A-Z)Included
  • Numbers (0-9)Included
  • Special characters (!@#$%^&*)Included
  • No sequential keyboard patternsClean

Estimated Crack Time

Estimated time required for an attacker to crack this password using exhaustive brute-force searching across different computing attack scenarios:

Online Throttled Attack

100 guesses / sec (Web rate limit)
Centuries (Virtually Uncrackable)

Unthrottled Web Service

10,000 guesses / sec (Basic API)
Centuries (Virtually Uncrackable)

Fast GPU Hashcat Rig

100 Billion / sec (Offline NTLM/MD5)
Centuries (Virtually Uncrackable)

Supercomputer Cluster

10 Trillion / sec (State-level actor)
139 billion years

NIST Password Guidelines

  • Length trumps complexity: A 16-character passphrase made of 4 random words is far harder to crack than an 8-character string with complex symbols.
  • Never reuse credentials: A breach on one service exposes your entire digital identity if passwords are recycled.
  • Use Passkeys or 2FA: Two-Factor Authentication protects your accounts even in the rare event of password compromise.

Frequently Asked Questions

Yes. All password evaluation, entropy mathematical modeling, and character evaluations occur entirely in your local browser memory using client-side JavaScript. ClickBasic never transmits your typed password over the network, stores it in cookies, or logs keystrokes.

Password entropy measures the mathematical unpredictability of a password in bits. A password with 60 bits of entropy requires 2^60 guesses on average to brute-force. Security experts consider 80+ bits of entropy strong against modern GPU-accelerated dictionary attacks.

If an attacker steals a database of password hashes (e.g. NTLM or unsalted MD5/SHA256), they can run specialized rigs with multiple RTX 4090 GPUs generating over 100 billion hash guesses per second. That is why passwords under 10 characters can be cracked in seconds unless properly salted and stretched (using Argon2 or bcrypt).