UUID / GUID Generator — Free Online Tool

Generate RFC 4122 UUID v4 random identifiers. UUID / GUID Generator is a free online tool from the ToolsRift Hash & Crypto Tools collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

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How to use UUID / GUID Generator

  1. Open the UUID / GUID Generator above — it loads instantly, no account needed.
  2. Enter or upload your input. Everything is processed locally on your device.
  3. Get your result immediately and copy or download it with one click.

Frequently asked questions

What is a UUID?

A Universally Unique Identifier — a 128-bit label guaranteed to be unique across space and time.

What is UUID v4?

Version 4 UUIDs are randomly generated. Version 1 uses timestamp+MAC address.

What is the collision probability?

For v4 UUIDs, the probability of collision is astronomically low — 1 in 5.3×10³⁶.

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