⚖️ UUID (Universally Unique Identifier) vs GUID (Globally Unique Identifier)
Compare open RFC 4122 UUID standards against Microsoft GUID implementations.
Feature Matrix
| Feature / Metric | UUID (RFC 4122) | GUID (Microsoft) |
|---|---|---|
| Origin Specification | IETF RFC 4122 Open Standard | Microsoft COM/Windows API |
| Bit Length | 128 bits | 128 bits |
| Formatting | Lowercase hexadecimal with hyphens | Uppercase hexadecimal with braces |
Pros & Cons Contrast
UUID (RFC 4122)
🟢 Advantages
- Cross-platform open standard.
- Native browser and Node.js support.
🔴 Limitations
- 128-bit size can be larger than auto-incrementing integer IDs.
GUID (Microsoft)
🟢 Advantages
- Native integration in C#, .NET, and SQL Server.
🔴 Limitations
- Microsoft-specific terminology.
Frequently Asked Questions
Detailed standard and mode difference FAQs.