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UUID Generator

Generate random UUIDs (v4) in bulk, ready to copy.

Generated locally. Up to 50 at a time.

Runs locally in your browser. Your input is not uploaded or stored. You can verify this in your browser’s network panel.

What does this tool solve?

Generate NIL, v1, v3, v4, or v5 UUIDs in batches of up to 50. v3 and v5 accept a namespace UUID and name for deterministic identifiers.

What examples should you start with?

One random UUID

Input

version = v4 · quantity = 1

Output

e.g. 9b2f3b8e-2c7a-4f1d-9a3e-5c2d8f6a1b04

Bulk generation

Input

version = v1/v3/v4/v5 · quantity = 50

Output

50 UUIDs, one per line, ready to copy

How does it work?

v4 uses the browser cryptographic random source; v3 and v5 hash the namespace and name; v1 is time-based; NIL is the all-zero UUID.

Generation happens entirely in your browser — nothing is sent anywhere, and no list is kept after you leave the page.

What are the edge cases and limits?

  • UUID v4 is random; v1 is time-based; v3 and v5 are deterministic name-based identifiers.
  • Collisions are astronomically unlikely (2^122 possibilities) but the guarantee is probabilistic, not absolute.
  • UUIDs are not secrets — do not use them as the only protection for a resource.

Technical reference

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