✓ Crypto-secure✓ Bulk generate✓ Free forever

Free UUID Generator Online

Generate UUID v4, NanoID, and ULID. Bulk generate hundreds at once. Cryptographically secure.

Count:

Uppercase No dashes

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How to use UUID Generator

Three steps. Instant results.

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Step 1

Select UUID v4, NanoID, or ULID format.

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Step 2

Set the count (1-500) and options like uppercase or no dashes.

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Step 3

Click Generate and copy individual IDs or all at once.

How UUID Generator works

UUID v4 uses crypto.randomUUID() — the browser's built-in cryptographically secure random number generator. Each UUID is 128 bits represented as 32 hex digits in 8-4-4-4-12 format. NanoID generates compact 21-character URL-safe IDs using the same crypto API. ULID combines a millisecond timestamp with randomness, making it sortable by creation time. All generation happens in your browser — nothing is sent to any server.

Why use this UUID Generator?

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Cryptographically secure random generation

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UUID v4, NanoID, and ULID formats

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Bulk generate up to 500 IDs at once

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Uppercase and no-dash options for UUID

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100% free, no signup

Frequently asked questions

What is a UUID?

UUID (Universally Unique Identifier) is a 128-bit identifier designed to be unique. UUID v4 uses random numbers.

What is NanoID?

NanoID is a compact, URL-friendly unique ID. It is shorter than UUID and still has strong collision resistance.

What is ULID used for?

ULID is time sortable, so newer IDs sort after older ones while staying unique.

Is this generator free?

Yes. It is free with no signup or limits.

Are the IDs truly random?

Yes. It uses cryptographically secure random values from your browser.

Can I generate many IDs at once?

Yes. You can generate up to 500 IDs in one click.

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