Cryptographic keys,
tokens & passwords on demand.
A precision tool for developers and the security-minded: generate high-entropy passwords, hex keys, URL-safe tokens and PINs — then audit any password's strength. Nothing ever leaves the browser.
Key Generator
// fresh value generated on load
·········
Strength Audit
// analysed locally, never transmitted
Engineered for trust
The guarantees behind every value this tool produces.
CSPRNG only
Every byte is drawn from crypto.getRandomValues(), with rejection sampling to remove modulo bias.
Stateless & local
No backend, no storage, no logging. Open dev-tools — the network tab stays empty.
Four output formats
Passwords, hex secrets, URL-safe tokens and numeric PINs — one tool for every key you need.
The reference desk
Technical writing on entropy, keys and secure randomness.
📊 What Is Password Entropy, Really?
The one number that decides how long a key resists brute force — derived from scratch.
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SecureKeyGenerator is part of a family of client-side security utilities.