What is a UUID used for?

A universally unique identifier is commonly used as a database primary key, a session token, or any other identifier that needs to be unique across systems without a central coordinating authority.

How unlikely is a UUID collision?

For version 4 UUIDs, the probability of two randomly generated UUIDs colliding is astronomically small — practically negligible even when generating billions of them.

What does 'version 4' mean?

It indicates the UUID is generated using random or pseudo-random numbers, as opposed to other UUID versions that incorporate timestamps or hardware identifiers into their generation method.

Can I generate many UUIDs at once?

Yes — set your desired count and generate a whole batch in one click, useful for seeding test data or preparing multiple unique identifiers in advance.

Are UUIDs the same as auto-incrementing database IDs?

No — auto-incrementing IDs are sequential and predictable, while UUIDs are random and effectively unguessable, which matters for security and for merging data across distributed systems without ID collisions.

UUID Generator

Generate v4 UUIDs in bulk.

TL;DR: UUID Generator is a free, browser-based tool that lets you generate v4 UUIDs in bulk.

How many?

Format

About the UUID Generator

UUID / GUID Generator creates cryptographically secure Universally Unique Identifiers (UUID v4 random, UUID v1 timestamp, UUID v7 time-ordered, and GUIDs) individually or in bulk batches up to 1,000 IDs.

How to Use the UUID Generator

Select UUID version (UUID v4 Random, UUID v7 Time-Ordered, or Microsoft GUID).
Choose quantity (1 to 1,000 UUIDs) and formatting (Uppercase, Lowercase, with/without hyphens, braces `{}`).
Click 'Generate UUIDs'.
Copy generated UUID list or download as a text file.

Expert Tips for UUID Generator

UUID v4 for Random Unique IDs: Generates 128-bit random IDs with collision probability effectively equal to zero ( $1 \text{ in } 2^{122}$ ).
UUID v7 for Database Primary Keys: UUID v7 embeds a Unix millisecond timestamp at the beginning, ensuring chronological B-tree database indexing performance.
CSPRNG Cryptographic Security: Uses `crypto.getRandomValues()` for true cryptographic randomness.

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100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: A universally unique identifier is commonly used as a database primary key, a session token, or any other identifier that needs to be unique across systems without a central coordinating authority.
: For version 4 UUIDs, the probability of two randomly generated UUIDs colliding is astronomically small — practically negligible even when generating billions of them.
: It indicates the UUID is generated using random or pseudo-random numbers, as opposed to other UUID versions that incorporate timestamps or hardware identifiers into their generation method.
: Yes — set your desired count and generate a whole batch in one click, useful for seeding test data or preparing multiple unique identifiers in advance.
: No — auto-incrementing IDs are sequential and predictable, while UUIDs are random and effectively unguessable, which matters for security and for merging data across distributed systems without ID collisions.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). UUID Generator [Software]. https://nexlove.org/tools/uuid-generator.html

“UUID Generator.” NexLove.org, 2026, nexlove.org/tools/uuid-generator.html.

NexLove.org (2026) UUID Generator. Available at: https://nexlove.org/tools/uuid-generator.html (Accessed: 2026).

@misc{nexlove_uuid_generator,
  title = {UUID Generator},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/uuid-generator.html}
}

Embed This Tool

Add the live UUID Generator tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/uuid-generator.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="UUID Generator — NexLove.org" loading="lazy"></iframe>

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