UUID Generator
Generate standard Version 4 UUIDs (Universally Unique Identifiers) instantly. Create unique, collision-free identifiers for databases and software development.
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The UUID Generator by Coders Kit generates standard Universally Unique Identifiers (UUIDs), specifically Version 4 (random). A UUID (or GUID in Microsoft systems) is a 128-bit label used for information in computer systems. The probability of generating a duplicate UUID is so effectively zero that they are safe to use for database keys, session IDs, and unique file names across distributed systems.
Why Use UUID v4?
Global Uniqueness
Unlike auto-incrementing integers (1, 2, 3...), UUIDs can be generated on any device without checking a central database, guaranteeing no collisions will occur when data is merged.
Security & Privacy
Sequential IDs reveal information about your data volume (e.g., User ID 500 implies 500 users). Random UUIDs obscure this information, adding a layer of security.
Standard Format
Our tool generates RFC 4122 compliant UUIDs (e.g., `123e4567-e89b-12d3-a456-426614174000`), compatible with almost all modern databases like PostgreSQL, MongoDB, MySQL, and DynamoDB.
Frequently Asked Questions (FAQ)
- What is the chance of a collision?
- Practically zero. To have a 50% chance of a single collision, you would need to generate 1 billion UUIDs per second for about 85 years.
- Are these UUIDs stored?
- No. They are cryptographically generated in your browser at the moment you click "Generate" and disappear when you refresh the page.
- What is the difference between UUID and GUID?
- They are synonymous. UUID is the standard application terminology, while GUID (Globally Unique Identifier) is the term typically used in Microsoft technologies.