UUID Generator

UUID Generator is a free online tool that generate unique UUIDs (v4) instantly. Create single or bulk universally unique identifiers for your projects. Built for developers with clean output, proper formatting, and instant processing times.

What is UUID Generator | Rune

UUID Generator creates universally unique identifiers (UUID v4) for database primary keys, API keys, session tokens, and distributed systems. Generate single IDs or bulk-create hundreds instantly in your browser. Designed for software developers, DevOps engineers, and technical teams who need reliable developer utilities.

Supports multiple formats and standards commonly used in modern software development and API integration. Useful for debugging, testing, and validating data structures in web applications and backend services. This tool runs entirely in your browser, requiring no software downloads or installations on your device. All processing is handled locally in your browser.

UUID v4
Standard
Instant
Generation
Bulk
Support
100%
Client-Side

The Advantage of Using UUID Generator on Rune

UUID Generator brings together 6 capabilities, including uuid v4 standard, bulk generation, and one-click copy, in a single browser-based workspace. No installs, no sign-ups, no data leaving your machine. Every operation runs locally, so your files stay private by default.

Rune built UUID Generator for anyone who values getting things done over navigating menus and settings. Generate multiple UUIDs at once, from 1 to thousands, for database seeding and batch operations. It is the kind of tool you bookmark once and reach for whenever the need comes up.

Key Features of UUID Generator

UUID v4 Standard, Bulk Generation, and 4 more reasons to use UUID Generator

UUID v4 Standard

Generate RFC 4122 compliant version 4 UUIDs using cryptographically strong random values.

Bulk Generation

Generate multiple UUIDs at once, from 1 to thousands, for database seeding and batch operations.

One-Click Copy

Copy a single UUID or all generated UUIDs to clipboard with one click.

Format Options

Choose between standard format, uppercase, lowercase, or without hyphens.

Instant Generation

UUIDs are generated instantly using the Web Crypto API for maximum randomness.

Cryptographically Secure

Uses crypto.randomUUID() or equivalent for guaranteed uniqueness and randomness.

Key Advantages of UUID Generator

Browser-based processing

Every operation in UUID Generator runs locally on your device. Your data stays in your browser and is never sent to external servers.

UUID v4 Standard

Generate RFC 4122 compliant version 4 UUIDs using cryptographically strong random values. This feature is available for free with no usage limits on the standard tier.

Privacy by default

UUID Generator processes your data on your machine. Your files and text stay local. Nothing is stored after you close the tab.

Mobile and desktop ready

UUID Generator works on any screen size. The interface adapts to phones, tablets, and desktops so you can use it wherever you are.

No account needed

Use UUID Generator without creating an account or providing an email address. The free tier gives you full access to core features.

Free with no hidden costs

UUID Generator is completely free on the standard tier. There are no trial periods, no watermarks on output, and no surprise paywalls after you start using it.

Who Benefits from UUID Generator

UUID Generator fits into a wide range of workflows. Here is how different users put it to work.

Students and Academics
Use UUID Generator for assignments, research papers, and coursework. Generate RFC 4122 compliant version 4 UUIDs using cryptographically strong random values.
Professionals and Teams
Integrate UUID Generator into your daily workflow for faster turnaround on routine tasks. Generate multiple UUIDs at once, from 1 to thousands, for database seeding and batch operations.
Content Creators and Freelancers
Speed up your creative process with UUID Generator. Copy a single UUID or all generated UUIDs to clipboard with one click.
Developers and Technical Users
Add UUID Generator to your toolkit for quick utility tasks between coding sessions. Choose between standard format, uppercase, lowercase, or without hyphens.

How to Use UUID Generator

Getting started with UUID Generator takes under a minute

01

Set Quantity

Choose how many UUIDs you want to generate, 1 or bulk.

02

Generate UUIDs

Click generate to create unique identifiers instantly.

03

Copy & Use

Copy UUIDs to clipboard for use in your databases, APIs, or code.

Rune pro tipsPro Tips

  • UUID v4 uses random values and has a collision probability of approximately 1 in 5.3 × 10^36.
  • Use UUIDs as database primary keys in distributed systems to avoid conflicts between nodes.
  • Remove hyphens if you need a more compact format for URLs or file names.
  • Use bulk generation to seed development databases with unique identifiers.

Getting the Best Results with UUID Generator

Getting started with UUID Generator takes seconds. Choose how many UUIDs you want to generate, 1 or bulk. The interface loads quickly and puts the essential controls front and center so nothing slows you down.

Once your input is ready, generate uuids. Click generate to create unique identifiers instantly. Results appear in real time, giving you immediate feedback before you commit to a final output.

Finally, copy & use. Copy UUIDs to clipboard for use in your databases, APIs, or code. The entire process from start to finish typically takes under a minute for most inputs.

For the best experience, keep these points in mind: UUID v4 uses random values and has a collision probability of approximately 1 in 5.3 × 10^36. Use UUIDs as database primary keys in distributed systems to avoid conflicts between nodes. Small adjustments like these can make a noticeable difference in your output quality.

What You Can Do with UUID Generator

TASK 01

UUID v4 Standard

Generate RFC 4122 compliant version 4 UUIDs using cryptographically strong random values. Available for free with no file size restrictions on the standard tier.

TASK 02

Bulk Generation

Generate multiple UUIDs at once, from 1 to thousands, for database seeding and batch operations. Available for free with no file size restrictions on the standard tier.

TASK 03

One-Click Copy

Copy a single UUID or all generated UUIDs to clipboard with one click. Available for free with no file size restrictions on the standard tier.

TASK 04

Format Options

Choose between standard format, uppercase, lowercase, or without hyphens. Available for free with no file size restrictions on the standard tier.

Frequently Asked Questions

Have questions? Here are the answers about UUID Generator

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. The v4 format uses random values: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.

Can UUIDs collide?

Theoretically yes, but the probability is astronomically low, about 1 in 5.3 × 10^36. You'd need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of one collision.

Is UUID v4 secure?

UUID v4 is generated from cryptographically secure random numbers, but it's not designed as a security token. For security-sensitive use, consider dedicated secret generation.

What's the difference between UUID versions?

v1 uses timestamp + MAC address, v4 uses random values (most common), v5 uses namespace + name hashing. This tool generates v4, which is the most widely used.

Are the generated UUIDs truly unique?

Yes. They use cryptographically strong random values from the Web Crypto API, ensuring each UUID is unique.

Can I generate UUIDs without hyphens?

Yes, you can choose compact format without hyphens, which is useful for URLs, filenames, and databases that don't support the standard format.

Still need help?

Can't find what you're looking for? Our support team is here to assist you.

Contact Support

Tool Rating

Help other users by sharing your experience.

4.1 (411 ratings)

Rate this tool: