About UUID generator
Use the UUID v4 generator online for test records, correlation IDs, or application identifiers. You can generate a random GUID with the browser's crypto.randomUUID API. Each operation creates one identifier, not a sequential database key.
How to generate a UUID v4
- Open the generator in a modern browser over HTTPS.
- Select Generate to create one random UUID.
- Copy or download the identifier, and generate again for a different value.
A practical example
- Input
Select Generate; no input text is required.
- Result
A newly generated identifier in the 8-4-4-4-12 hexadecimal UUID layout.
The value is generated at runtime. No fixed example identifier is supplied for reuse as a real record ID.
Supported input and limitations
- Only UUID version 4 is generated. UUID v1, v7, namespaces, name-based UUIDs, and bulk generation are not included.
- Random UUIDs have a very low collision probability, not a mathematical uniqueness guarantee. Use a unique constraint where your application requires it.
Processing happens on your device. Read about local processing and optional workspace recovery.
Frequently asked questions
What is the difference between UUID and GUID?
GUID is commonly used as another name for the same identifier format. This tool specifically creates random version 4 UUIDs.
Can a UUID be used as a password or access token?
Do not assume an identifier is an authorization mechanism. Use a purpose-built secret-token design and enforce authorization independently of record IDs.