How Secure Is Your Password?
Test password entropy and calculate real-world brute-force crack time against modern RTX 4090 GPU clusters. 100% private, in-browser analysis.
Check Password Strength & Crack Time
Estimated Brute-Force Crack Times by Attacker Hardware:
Throttled Online Attack
Web login with basic rate-limiting
Unthrottled API Attack
Fast web API without captcha
Single Modern GPU (RTX 4090)
Hashcat offline brute force (NTLM/MD5)
Nation-State / 1,000 GPU Cluster
Organized syndicate GPU farm
Never paste passwords in WhatsApp or email. Create a zero-knowledge self-destructing link that burns forever once read.
How Brute Force Password Cracking Works in 2026
Modern threat actors do not guess passwords manually. When a database breach occurs (e.g., millions of leaked hashes), attackers load the dumped hashes into dedicated cracking rigs equipped with modern GPUs like the NVIDIA GeForce RTX 4090. Using specialized open-source tools like Hashcat, a single GPU can test tens of billions of password permutations every second.
| Hashing Algorithm | Typical Usage | Single RTX 4090 Speed | Resistance Level |
|---|---|---|---|
| NTLM | Windows Active Directory | ~150 Billion/sec | Extremely Vulnerable |
| MD5 | Legacy Web Databases | ~80 Billion/sec | Extremely Vulnerable |
| SHA-256 | Standard Cryptographic Hashing | ~10 Billion/sec | Weak for Passwords |
| Bcrypt (cost 12) | Modern Web Applications | ~12,000/sec | Highly Resistant |
| Argon2id | Next-Gen Memory-Hard Standard | ~4,000/sec | Industry Gold Standard |
Understanding Password Entropy (The Math Behind Security)
In information theory, password strength is measured in bits of entropy. Entropy represents the number of binary questions an attacker must answer to guess your secret. The formula is:
- Under 28 bits: Cracked in under a second by any computer.
- 28 – 45 bits: Vulnerable to consumer desktop brute-forcing in minutes to hours.
- 46 – 64 bits: Good against online rate-limited logins, but crackable offline.
- 65 – 80 bits: Strong; requires multi-GPU clusters and significant financial investment.
- 80+ bits: Mathematically unbreakable; outlasts the lifespan of our sun.