DevCoreTools

Developer generator

UUID Generator

Generate random UUIDs instantly in your browser. Create single or multiple UUIDs for APIs, databases, tests, mock data, logs, and development workflows.

Generator options

Choose a batch size and output shape, then generate secure random UUID v4 values.

Generate 1 to 1,000 UUIDs at a time.

Defaults produce lowercase UUID v4 values, one per line.

One UUID per line.

Identifier, not a secret: UUIDs are useful identifiers, but they are not passwords, secrets, or encryption keys.

Generated UUIDs

Your generated UUIDs will appear here.

Choose your options and select Generate UUIDs.

Static example UUID550e8400-e29b-41d4-a716-446655440000
Nothing is saved automatically.

What is a UUID?

A UUID is a universally unique identifier commonly used to label records and events across software systems without coordinating with a central ID service.

What is UUID v4?

UUID v4 values are generated from random bytes with defined version and variant bits. They are commonly used for development IDs, APIs, databases, logs, tests, and sample data.

How to use this UUID Generator

  1. Choose a quantity from 1 to 1,000.
  2. Select the output format that matches where you plan to paste the UUIDs.
  3. Choose uppercase or compact formatting if needed.
  4. Generate, then copy one value, copy the full output, or download it.

Common use cases

  • Database IDs and mock records
  • API request and correlation IDs
  • Test data and temporary identifiers
  • Log tracing across services

UUID vs GUID

GUID is a term commonly used in Microsoft ecosystems, while UUID is the broader standards-based term. In everyday development, both usually refer to the same kind of 128-bit identifier.

UUIDs are not secrets

Do not use UUIDs as passwords, private keys, API keys, session secrets, or encryption keys. Use a purpose-built cryptographic token generator for secret material.

Privacy

This generator runs entirely in your browser. Generated values are not uploaded, sent to a backend, stored automatically, or included in analytics events.

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Frequently asked questions

Is this UUID Generator free?

Yes, it is free to use.

Does this tool upload generated UUIDs?

No. UUIDs are generated locally in your browser.

What UUID version does this tool generate?

It generates UUID v4 values.

Can I generate multiple UUIDs at once?

Yes, you can generate up to 1,000 UUIDs at a time.

Can I copy all UUIDs?

Yes. Use the Copy All button to copy the output in your selected format.

Can I download the generated UUIDs?

Yes, download the current output as a text file.

What is the difference between UUID and GUID?

GUID is often used in Microsoft environments, while UUID is the broader standard term. In most developer workflows they refer to the same kind of identifier.

Are UUIDs secure passwords?

No. UUIDs are identifiers, not passwords or encryption keys.