Is the UUID Generator free?

Yes — the UUID Generator is completely free, with no account, subscription, signup, or usage limits.

Is my data uploaded or stored?

No. The UUID Generator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.

Does the UUID Generator work offline?

Yes. Once the page has finished loading, the UUID Generator works without an internet connection.

Which browsers does the UUID Generator work in?

The UUID Generator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.

How unique is a UUID v4?

Extremely unique. There are 2^122 possible v4 UUIDs (~5.3 × 10^36). The probability of generating the same UUID twice is astronomically small.

What is the difference between UUID and GUID?

They are the same thing. UUID is the IETF standard term (RFC 4122); GUID (Globally Unique Identifier) is Microsoft's terminology for the same concept.

Can I use the free UUID Generator for production identifiers?

Yes — the generator uses the browser's cryptographically secure random number generator, making it suitable for production use.

UUID Generator

Generate random UUID v4 identifiers instantly.

Count 5

Format

9c0fc8af-ad67-4b2e-b205-8e2406140c95

1e97a32a-9c0a-4ee6-85ef-ddfabc1cc1f9

f3bdd8c5-c7c5-4385-822e-562139132de2

84a1cbd8-d865-4ba0-b72c-f8addbcf39bc

38a3dd00-ab2b-462f-81af-3e10921d0193

Free browser-based tool · Runs 100% on your device · Last updated July 7, 2026

What is the UUID Generator?

The free UUID Generator produces one or more version 4 (random) UUIDs instantly. Choose how many to generate using the count field (up to 100 at once), then pick an output format: Standard (lowercase with hyphens), Uppercase, Upper, no dashes, Braces ({uuid}), or URN. Each UUID can be copied individually or all at once.

→ Generate unique identifiers for database primary keys or foreign keys.
→ Create request correlation IDs for distributed system tracing.
→ Produce unique filenames for uploaded assets to avoid collisions.
→ Generate test data with realistic UUIDs for unit and integration tests.
→ Create session tokens or idempotency keys for API requests.

How to Use the UUID Generator

1 Set the count field to how many UUIDs you need (default: 5).
2 Choose an output format from the dropdown: Standard, Uppercase, Upper, no dashes, Braces, or URN.
3 Click Generate to produce fresh UUIDs.
4 Click the copy icon next to any individual UUID, or use Copy All to grab the entire list.

Key Features

🆔
UUID v4 (random)

All generated UUIDs use cryptographically random bits for maximum uniqueness.
🔢
Batch generation

Generate up to 100 UUIDs at once for bulk data needs.
📋
Six output formats

Standard, uppercase, no-dashes, braces, URN — pick the format your system expects.
🔒
Private & local

All UUIDs are generated in your browser using crypto.randomUUID(). Nothing is uploaded.

Example Usage

Example Input

Count: 3, Format: Standard

Example Output

a3f4c2d1-8b7e-4f6a-9c0d-e5f1a2b3c4d5
7e1b5a9c-2d4f-4e8b-b3a1-6c9d0e7f8a2b
f2c0b8e4-3a6d-4c7f-a8e9-1b2c3d4e5f6a

Frequently Asked Questions about the UUID Generator

What is the UUID Generator?: The UUID Generator is a free online tool that lets you generate random UUID v4 identifiers instantly. It runs entirely in your browser, so there is nothing to install and nothing is uploaded to a server.
Is the UUID Generator free?: Yes — the UUID Generator is completely free, with no account, subscription, signup, or usage limits.
Is my data uploaded or stored?: No. The UUID Generator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.
Does the UUID Generator work offline?: Yes. Once the page has finished loading, the UUID Generator works without an internet connection.
Which browsers does the UUID Generator work in?: The UUID Generator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.
How unique is a UUID v4?: Extremely unique. There are 2^122 possible v4 UUIDs (~5.3 × 10^36). The probability of generating the same UUID twice is astronomically small.
What is the difference between UUID and GUID?: They are the same thing. UUID is the IETF standard term (RFC 4122); GUID (Globally Unique Identifier) is Microsoft's terminology for the same concept.
Can I use the free UUID Generator for production identifiers?: Yes — the generator uses the browser's cryptographically secure random number generator, making it suitable for production use.