UUID Generator
Generate RFC 4122 UUIDs (v1, v4, v5, v7) individually or in bulk.
Generated using crypto.randomUUID() — cryptographically secure RFC 4122 v4.
Frequently Asked Questions
Is the UUID Generator secure?
Yes. All cryptographic operations use the browser's built-in Web Crypto API, a FIPS-approved implementation. Everything runs client-side — no keys, passwords, or tokens are ever sent to a server.
How does guid work in this tool?
This tool leverages the browser's native Web Crypto API to perform guid operations. The algorithm executes entirely inside your browser's JavaScript engine so your sensitive data is never exposed to any external service.
What is the difference between uuid and encryption?
Uuid typically produces a fixed-length output that cannot be reversed, making it ideal for verification and integrity checks. Encryption is a two-way process that allows the original data to be recovered with the correct key.
Can I use UUID Generator offline?
Yes. When you install Web Developer Toolbox as a Progressive Web App (PWA), the UUID Generator works fully offline — the service worker caches all assets so no internet connection is required.
How long should my uuid be?
Current industry best practices recommend at least 128 bits (16 bytes) for tokens and at least 256 bits for cryptographic secrets. Longer values provide significantly stronger security guarantees against brute-force attacks.