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UUID Generator Online Free — PrivaTools

TL;DR: Click Generate and copy a v4 or v7 UUID — bulk-generate up to 500 at a time, pure browser.

Generate UUIDs online for free — create v4 (random) UUIDs in bulk with copy-to-clipboard. Browser-only, nothing leaves your device. Perfect for API keys and IDs.

Every PrivaTools tool — including UUID Generator — is genuinely free with no premium tier, no per-day limit, and no watermark on the output. Files are deleted from the server within seconds of your download completing. Source code: github.com/taiyeba-dg/privatools.

How to Use UUID Generator

  1. Choose UUID version — v4 (random — most common). v1 (time + MAC — rare). v7 (time-sortable random — modern recommendation).
  2. Choose bulk count — 1 to 1000 UUIDs at once.
  3. Copy or download as text — Runs entirely in your browser using Web Crypto API.

Frequently Asked Questions

What's the difference between v4 and v7?

v4 is purely random — unsortable. v7 (new in 2024) embeds a timestamp prefix so UUIDs sort chronologically. Use v7 for database primary keys.

How likely is a collision?

v4 collision after generating 2^61 ≈ 2.3 quintillion UUIDs. Practically impossible.

Are they cryptographically random?

v4 uses Web Crypto's getRandomValues — yes, cryptographically secure.

Last reviewed 2026-01-12 by the PrivaTools maintainers. Source code on (MIT-licensed, self-hostable).

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