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UUID Generator

Generate RFC4122 v4 UUIDs one at a time or in bulk.

Generate RFC4122 v4 UUIDs one at a time or in bulk.

Quick start: Click 'Generate' to create a single RFC 4122 v4 UUID instantly. → Use the bulk mode to generate multiple UUIDs at once — enter the quantity you need. → Each UUID appears in the output list in standard 8-4-4-4-12 format.

How to use UUID Generator

  1. 1

    Click 'Generate' to create a single RFC 4122 v4 UUID instantly.

  2. 2

    Use the bulk mode to generate multiple UUIDs at once — enter the quantity you need.

  3. 3

    Each UUID appears in the output list in standard 8-4-4-4-12 format.

  4. 4

    Click the copy button to place one or all UUIDs on your clipboard.

Real examples of UUID Generator in action

Single UUID for a record
Before
Click Generate
After
3b1c9a72-5f83-4d1e-9d4c-2e5f1a8b6d7f
Bulk 100 for seed data
Before
Set count to 100, click Generate
After
100 v4 UUIDs in a copyable list, ready for database seeding
File upload keys
Before
Need unique S3 object keys for a batch upload
After
10 UUIDs to use as filenames (no collision risk)
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Who is UUID Generator for?

Backend developers seeding primary keys for new database records

Test engineers generating bulk unique IDs for load-test fixtures

DevOps teams creating unique correlation IDs for distributed tracing

Cloud engineers generating unique object keys for S3 uploads

Database migrators creating UUIDs for records that need globally unique IDs

Why use UUID Generator?

  • Generates cryptographically secure v4 UUIDs using the browser's crypto.randomUUID() API.
  • Bulk generation produces any number of UUIDs at once — useful for seeding databases or test fixtures.
  • Standard 8-4-4-4-12 format is compatible with all major databases and programming languages.
  • Runs entirely in your browser — no network requests, no rate limits.

Common use cases

  • Generate unique identifiers for database records, API keys, or session tokens during development.
  • Seed test databases and fixture files with realistic UUIDs for integration testing.
  • Create unique filenames or resource identifiers for cloud storage uploads.
  • Produce batch UUIDs for import files when migrating data between systems.

How UUID Generator keeps your data private

UUIDs are generated using crypto.randomUUID() which draws from your operating system's cryptographic entropy pool — the values are created on your machine and never transmitted. Because they're truly random, there's also no privacy risk that a generated UUID could be predicted or re-derived from any input you provided.

How UUID Generator compares to alternatives

Honest comparison to other popular options — pick the right tool for the job.

ToolMain limitation
UUIDGenerator.netGenerates on their server, which adds unnecessary network latency and logging
Online GUID GeneratorAd-heavy interface with slow page loads between bulk generations
uuidgen CLIRequires terminal access and different commands on macOS, Linux, and Windows
UUID GeneratorFree, runs in your browser, no sign-up, no watermarks, no file-size limits beyond your device memory.

About UUID Generator

UUIDs (Universally Unique Identifiers) are the standard way to create unique IDs in software development. Xevon Tools' UUID Generator produces RFC 4122 version 4 UUIDs using the browser's cryptographically secure random number generator (crypto.randomUUID). The output follows the standard 8-4-4-4-12 hexadecimal format that is universally compatible with databases like PostgreSQL, MySQL, and MongoDB, as well as every major programming language. Bulk mode lets you generate any number of UUIDs at once, which is invaluable for seeding test databases, creating fixture files, or preparing import data for migrations. With 122 bits of randomness per UUID, the probability of a collision is effectively zero for any practical workload. One-click copy puts the result on your clipboard instantly. Because everything runs in your browser, there are no rate limits, no network requests, and no account required. Whether you need a single ID for a new database record or a thousand for a load test, this tool delivers them in milliseconds.

Frequently asked questions

Yes. The tool uses crypto.randomUUID(), which relies on the browser's cryptographically secure random number generator. The output is suitable for use as unique identifiers in production systems.
Version 4 (v4), which is the most commonly used version. V4 UUIDs are generated from random numbers rather than timestamps or hardware addresses, making them suitable for distributed systems.
There is no hard limit. Bulk mode lets you generate hundreds or thousands of UUIDs in one click. The practical limit depends on your browser's memory, but generating thousands is typically instant.
With 122 bits of randomness, the probability of a collision is astronomically small — roughly 1 in 2^61 after generating a billion UUIDs. For all practical purposes, they are unique.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

Learn more

Embed UUID Generator on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

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