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UUID Generator — Bulk v1, v4, v7 & Nil UUIDs Online

Generate UUIDs online — v1, v4, v7, and Nil. Bulk generation up to 10,000. Free, no signup.

Free No signup Client-side Privacy friendly Updated
Format

UUIDs

UUID Decoder

How to use

  1. 1 Pick a UUID version — v4 for random, v7 for sortable time-ordered, v1 for legacy.
  2. 2 Set the quantity (1 to 10,000) and choose format options (case, hyphens, braces).
  3. 3 Click Generate. Copy individual UUIDs or copy all / download as txt, csv, or json.

Why use this tool

  • Generate up to 10,000 UUIDs at once — instantly.
  • Supports v1 (timestamp), v4 (random), v7 (time-ordered, RFC 9562), and the Nil UUID.
  • Built-in decoder: paste a UUID to inspect its version, variant, and embedded timestamp.
  • Runs entirely in your browser — never sends UUIDs to a server.
  • Free, no signup.

Frequently asked questions

What is the difference between UUID v4 and v7?

v4 is fully random — great for unique IDs but not sortable. v7 (RFC 9562, 2024) embeds a millisecond timestamp at the start, making UUIDs sortable by creation time while still being cryptographically random.

Are these UUIDs cryptographically secure?

Yes — generated via the Web Crypto API (crypto.getRandomValues / crypto.randomUUID). Suitable for IDs that must not collide.

Can I generate more than 10,000 at once?

The UI is capped at 10,000 to avoid freezing the browser. For larger batches, run a script or call generate() multiple times.

Does the decoder support v1 timestamps?

Yes — v1 and v7 both extract the embedded timestamp. v4 has no timestamp (it is purely random).

What is UUID Generator?

A UUID (Universally Unique Identifier) is a 128-bit value defined by RFC 9562 (formerly RFC 4122). UUID v4 is randomly generated; v1 is timestamp + MAC-derived; v7 is time-ordered for database-friendly sorting; the Nil UUID is all zeros. A UUID Generator produces these values without coordinating with any central authority, with collision odds negligible for practical use.

How UUID Generator compares to alternatives

UUID Generator versus typical browser and desktop alternatives — features compared at a glance.
Feature Zerethon Tools Typical online tools Desktop apps
Bulk count Up to 10,000 1–100 Unlimited
v1 / v4 / v7 / Nil All four Usually v4 only All four
Rate limits None Sometimes None
Runs offline Yes (after load) No Yes
Signup required No Sometimes No
Summary

UUID Generator is a free developer utility by Zerethon Tools. Generate UUIDs online — v1, v4, v7, and Nil. Bulk generation up to 10,000. Free, no signup. Runs entirely in the browser — no signup, no upload.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. UUID Generator runs entirely client-side — no server upload, no logging, no tracking of your input.

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