UUID Generator
Generate RFC 4122 Version 4 UUIDs instantly in your browser. Create one or multiple universally unique identifiers with a single click.
Status
v4
Version
1
Generated
36
Characters
36 B
Size
Privacy
Everything is generated locally. Nothing is uploaded. No data is stored.
How To Use
Choose how many
UUIDs to generate, from 1 up to 100.
Click Generate UUID(s)
to create your identifiers.
Review generated UUIDs
in the output area.
Copy or download them
for use in your project.
Generate again
whenever you need more.
About UUID Generator
A UUID generator creates universally unique identifiers — random values used to identify records, objects, transactions, sessions, and other resources in software applications. The DevToolVerse UUID Generator lets you generate UUIDs online, creating random UUID v4 identifiers directly in your browser. Whether you're seeding database records, generating API keys, or preparing test data, this tool makes it easy to produce one or many UUIDs at once.
All generation happens locally in your browser, meaning nothing is uploaded to a server. This keeps your usage private while providing fast, reliable UUID generation for development and testing.
Need to use a UUID somewhere else in your workflow? Format the surrounding data with the JSON Formatter, or pair it with a timestamp using the Timestamp Converter.
Features
RFC 4122 Version 4
generates standards-compliant, randomly generated UUIDs.
Multiple UUID Generation
generate anywhere from 1 to 100 UUIDs at once.
Browser Processing
every UUID is generated entirely on your device.
Copy All
copy every generated UUID to your clipboard with one click.
Download TXT
save your generated UUIDs as a plain text file.
Privacy First
your data is never uploaded or stored.
Fast Generation
instant results with no noticeable delay.
No Registration Required
use the tool instantly, with no account or sign-up.
Quick Reference
A quick look at what makes a UUID v4 identifier, and where it's typically used in development, testing, and production systems.
- RFC 4122 Version 4
- Generated using random values
- 36 characters including hyphens
- Ideal for databases, APIs and distributed systems
Example
550e8400-e29b-41d4-a716-446655440000
How UUIDs Are Generated
This tool generates UUIDs using crypto.randomUUID(), a native method of the Web Crypto API available in modern browsers. It produces RFC 4122 Version 4 UUIDs using the platform's cryptographically strong random number generator, rather than a general-purpose pseudo-random function such as Math.random().
- UUID generation happens entirely in your browser. Values are never sent to a server.
- UUIDs are designed to provide practically unique identifiers — the chance of a collision is negligible, though not mathematically impossible.
- A UUID is an identifier, not a secret. It shouldn't be treated as a password or used in place of a dedicated authentication or security token.
FAQ
A UUID generator creates universally unique identifiers (UUIDs) — 128-bit values used to identify records, objects, transactions, sessions, and other resources in software applications. DevToolVerse's UUID Generator creates random UUID v4 values directly in your browser, ready to use right away.
Open the UUID Generator, choose how many UUIDs you need (1 to 100), and click Generate UUID(s). Your identifiers appear instantly in the output area, ready to copy or download.
Yes. Every UUID this tool creates is a random UUID v4, generated using your browser's built-in random number generator. You can generate one at a time or up to 100 at once.
UUID v4 is generated using random or pseudo-random numbers rather than a timestamp or hardware address. It is the most commonly used UUID version, defined by the RFC 4122 specification, and is a common choice for application data, testing, APIs and database identifiers.
Collisions are theoretically possible but practically negligible. With 122 random bits, the probability of generating a duplicate UUID v4 is astronomically small.
Yes. UUID generation happens entirely on your device. Nothing is uploaded to a server, so your usage stays private.
Yes. The DevToolVerse UUID Generator is completely free to use, with no account, sign-up, or hidden limits beyond generating up to 100 UUIDs per batch.
UUIDs are commonly used as primary keys in databases, identifiers in APIs and distributed systems, session or transaction IDs, and placeholder values in test data — anywhere you need a unique identifier without coordinating with a central authority.