Generate cryptographically secure passwords, UUIDs, and ULIDs — entirely in your browser. Generated output is never stored or transmitted and never leaves your device.
UUID versions differ in how uniqueness is achieved — from random (v4) to time-sorted (v7) to deterministic hashes (v3/v5).
Full guide arrow_forwardULIDs are lexicographically sortable identifiers — 48-bit timestamp + 80-bit random, encoded in Crockford Base32.
Full guide arrow_forward100% client-side. Generated passwords and codes never leave your browser.
Cryptographically secure random generation via the Web Crypto API (CSPRNG).
No tracking, no accounts, no server-side processing. Fully open and transparent.
Works offline as an installable PWA. Use it anywhere, anytime.
RFC-compliant UUID generation (v1–v8) and monotonic ULID support.
All generation happens in your browser using the Web Crypto API. No data is ever sent to a server — there is no server-side component.
Uses your device's cryptographically secure random number generator (CSPRNG), drawing entropy from hardware sources for unpredictable output.
Customise length, character types, and modifiers. Your preferences are saved locally so they're ready next time you visit.
How BIP39 turns randomness into memorable word sequences, why the standard uses exactly 2048 words, and how seed phrases protect billions in cryptocurrency.
Read article arrow_forwardHow attackers weaponise stolen credentials at industrial scale, why password reuse is the single biggest risk to your online accounts, and what you can do to protect yourself.
Read article arrow_forwardWhat makes a random number generator cryptographically secure, why Math.random() fails at security, and how CSPRNGs power tools like Safe Pass Guru to produce truly unpredictable passwords.
Read article arrow_forwardInstall Safe Pass Guru
Use offline as a secure app