UUID Generator
Generate UUID v4 values instantly. Copy individually or in bulk, customize formatting, and validate existing UUIDs.
Validate a UUID
Paste any UUID to check if it's valid.
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UUID v4: Universally Unique Identifiers are 128-bit values used to uniquely identify resources. Version 4 uses random data, making collisions astronomically unlikely — roughly 1 in 5.3×10³⁶.
Uses the browser's native crypto.randomUUID() API — all generation happens locally, nothing is sent to a server.