UUID Generator
Generate unique UUIDs (universally unique identifiers) instantly. Perfect for databases, APIs, and applications.
Generator Settings
Generated UUIDs
09740e23-11b8-42b5-85d6-4b573b4892eeWhat is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used to identify information in computer systems. This tool generates UUID v4 identifiers using random values, making them virtually unique and perfect for databases, APIs, and distributed systems.
How the UUID Generator Works
The UUID generator creates unique identifiers that can be copied into databases, API records, test data, logs or application configuration. UUIDs help avoid collisions when records are created across different systems.
Formula
A UUID v4 is generated from random values and formatted as 32 hexadecimal characters separated by hyphens in the 8-4-4-4-12 pattern.
Example
A generated ID can be used as a public-safe reference such as an order token, API request ID or database primary key when sequential IDs are not ideal.
Limitations
Random UUIDs are designed to be practically unique, but they are not human friendly and should not be treated as passwords or secret authentication tokens.
How to use the result responsibly
- Check that every input uses the unit and time period shown beside the field.
- Compare the result with the worked example and formula above.
- For financial, tax, health, or legal decisions, confirm current rules with a qualified professional or the relevant authority.
Frequently Asked Questions
When should I use a UUID?
Use UUIDs when records may be created in multiple places and you want an identifier that is unlikely to clash without checking a central counter first.
Are UUIDs secure?
UUIDs are identifiers, not credentials. They are fine for record IDs, but private access should still use proper authentication and authorization.
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Editorially reviewed August 18, 2026. Read our calculation methodology and editorial policy.