Audit password strength in exact Shannon/pool entropy bits and simulate brute-force resistance against 100B/sec offline GPU hashcat clusters.
Step-by-Step Client-Side Workflow
Type or Generate a Candidate Password: Enter any password or passphrase into the local auditor input.
Inspect Exact Bit Entropy: View character pool size, bit strength rating, and visual strength progress.
Compare 3 Attack Threat Models: See estimated time-to-crack across Online Throttled, Offline Fast Hash (100B/sec GPU), and Massive ASIC arrays.
Why Use VaultTools Zero-Upload Architecture
Immune to Math.random() Predictability: Never rely on predictable PRNGs. Every character is backed by OS-level cryptographic entropy.
Easy to Type, Impossible to Brute-Force: A 5-word passphrase with a number delivers 80+ bits of entropy while remaining effortless to remember.
100% Offline Strength Auditing: Test the entropy of your existing passwords without typing them into an online form that could log keystrokes.
Frequently Asked Questions
Is it safe to test a real password in this entropy calculator?
Unlike cloud password checkers that send your keystrokes over XHR requests, VaultTools computes entropy mathematically inside your local browser tab with zero network traffic.
How many bits of entropy makes a password secure in 2026?
For everyday accounts, aim for at least 65–75 bits of entropy. For master password managers, crypto wallets, and production API secrets, 90 to 128+ bits is recommended.