UUID Generator
Generate secure UUID v4 identifiers instantly in your browser, one at a time or in bulk.
Generate UUIDs
Generate between 1 and 100 UUID v4 values.
Generated UUIDs
What is a UUID?
A UUID is a 128-bit identifier commonly used to give records, objects and resources unique IDs without relying on a central counter. This tool generates version 4 UUIDs using browser cryptography.
When to use UUID v4
UUID v4 is useful for database keys, test fixtures, API payloads, temporary identifiers and distributed systems where randomly generated IDs are appropriate.
Privacy
Generation happens locally in your browser. The generated values are not sent to KRIYANO.
How to use this tool effectively
Use this UUID generator when you need random version 4 identifiers for application records, API examples, test data or distributed systems. UUID v4 values are generated from random bytes, so separate systems can create identifiers without coordinating a shared numeric counter.
Common uses
- Create primary keys or public identifiers for prototypes and test fixtures.
- Generate several IDs at once for API payloads, seed data or spreadsheet imports.
- Produce hyphenated or compact UUID values while preserving UUID v4 randomness.
- Create sample identifiers for documentation without exposing production data.
Example: create test IDs for an API
Generate 3 UUIDs with hyphens
550e8400-e29b-41d4-a716-446655440000 6ba7b810-9dad-4d80-80b4-00c04fd430c8 9b2f4ac1-2b75-4a8e-9bd3-2e4c1f1029b4
Each value follows the familiar UUID layout. The exact values will be different every time because version 4 UUIDs are random.
Common mistakes to avoid
- Do not treat random UUIDs as secret tokens; uniqueness and secrecy are different properties.
- Do not remove hyphens if another system expects the standard 36-character display format.
- Check whether a database already has a native UUID type before storing identifiers as plain text.
UUIDs are generated in your browser. KRIYANO does not receive or store the generated values.
Frequently asked questions
Are UUID v4 values guaranteed to be unique?
No random identifier can provide a mathematical guarantee, but the 122 random bits available in UUID v4 make accidental collisions extremely unlikely for normal application use.
Is a UUID the same as a GUID?
GUID is Microsoft terminology for identifiers that generally use the UUID format. In everyday development, the terms are often used interchangeably.
Can I use these UUIDs as passwords or API keys?
They are identifiers, not password-strength secrets. Use a purpose-built secure token generator when secrecy and unpredictable authentication credentials are required.