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Password Strength Analyzer
Entropy estimate with concrete feedback. Nothing is stored.
What it does
Entropy estimate with concrete feedback. Nothing is stored. Part of Security & Privacy — Encryption, redaction, and audits on your device.
Also found under: entropy, strong password, zxcvbn.
When to use it
Check a new master passphrase scores Excellent before committing to it.
Privacy & safety
Pattern-based estimate computed in the input field. The password itself is never stored or recorded.
This tool works on text you paste — nothing leaves the page until you copy or save it yourself.
Related tools
- File & Text Hash Verifier — Recompute SHA-256/SHA-512 and compare against an expected value.
- File Encryption & Decryption — AES-GCM with PBKDF2. Keys never leave this device or logs.
- File Integrity Monitor — Baseline SHA-256 manifests, then verify for added/changed/removed files.