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UUID Generator

100% client-side • Cryptographically random

Generate UUID v4 (random) identifiers instantly. Copy individually or batch-generate up to 25 at once.

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Free forever • Instant • Cryptographically random

Uses crypto.randomUUID() — RFC 4122 v4 UUIDs generated entirely on your device.

Batch:

Format: Standard UPPERCASE No Dashes

Click Generate to create UUIDs

RFC 4122 compliant • v4 (random) • Standard

How It Works

1. Cryptographically Random

Uses the browser's built-in crypto API to generate true random bytes — not weak Math.random().

2. RFC 4122 v4

UUID v4 format with proper version (4) and variant bits set per the specification.

3. Zero Uploads

Everything stays in your browser. We never see the UUIDs you generate. 100% private.