Free browser-based developer tool

UUID Generator

Generate random UUID v4 values for databases, APIs, testing, sample data, software development, logs, configuration files, and unique identifiers.

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Generate UUIDs and GUIDs online
A UUID, also known as a universally unique identifier, is a 128-bit identifier commonly used in databases, APIs, distributed systems, logs, test data, file names, application records, and software development. UUIDs help identify records without relying on sequential numbers.
This UUID generator creates random UUID v4 values in your browser. You can generate one UUID or create a bulk list, copy the result, download it as a text file, convert the output to uppercase, or remove hyphens when your system requires a compact identifier format.
UUID v4 generator
Create random UUID version 4 identifiers for development, testing, and data records.
Bulk UUID generator
Generate up to 1000 UUIDs at once and copy or download the list.
GUID format
UUID and GUID are often used interchangeably in many software and database systems.
Private workflow
The UUIDs are generated in your browser without requiring account creation.
Common uses for UUIDs
  • Database primary keys or external public IDs.
  • API request IDs, correlation IDs, and tracking IDs.
  • Test data generation for software projects.
  • Unique file names, upload IDs, and session references.
  • Distributed systems where many services create IDs independently.
UUID v4 format
A standard UUID is usually shown as five groups of hexadecimal characters separated by hyphens, such as 550e8400-e29b-41d4-a716-446655440000. UUID v4 values are random-based identifiers. They are not designed to be human readable, but they are useful when a unique-looking identifier is needed across systems.
UUID safety notes
UUIDs are useful identifiers, but they should not be treated as passwords, secret tokens, or security keys. For authentication, password reset links, payment flows, and private access tokens, use proper cryptographic security practices and server-side validation.
FAQ
Is this UUID generator free?
Yes. You can generate UUIDs for free without creating an account.
Can I generate multiple UUIDs?
Yes. You can generate up to 1000 UUIDs at once.
What is the difference between UUID and GUID?
In many practical cases, UUID and GUID refer to the same type of unique identifier.
Are UUIDs secret?
No. UUIDs are identifiers, not secrets. Do not use them alone as passwords or secure tokens.