UUID•100% Client-Side

UUID v4 Generator Online

Generate cryptographically secure random UUIDs (v4) in bulk. Configure settings to remove hyphens, append curly braces, or convert to uppercase. Built client-side using secure browser APIs.Reference Spec: IETF RFC 4122 (UUID Specification)→

Generated Identifiers

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Frequently Asked Questions (UUID Generator)

What is a UUID v4?

A UUID (Universally Unique Identifier) version 4 is a 128-bit label generated randomly using cryptographically secure values. It consists of 36 characters including 4 hyphens (structured as 8-4-4-4-12) and is designed to have an extremely low collision probability.

How secure is this UUID generator?

Extremely secure. The tool calls the browser's native window.crypto API, which utilizes cryptographically strong pseudo-random number generator (CSPRNG) seeds. Everything runs local on your hardware; no remote seeds are gathered.

Why would I remove hyphens or add braces?

Different database engines, configurations, or languages require unique formats. Microsoft SQL Server often stores identifiers inside braces (e.g. {UUID}), while some storage systems prefer stripped 32-character hexadecimal strings (no hyphens) to save indexes and memory.

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