GUID Generator
Generate GUIDs (Globally Unique Identifiers) instantly in your browser. GUID is Microsoft's term for UUID — they're the same 128-bit identifiers. This tool generates v4 GUIDs with support for Microsoft-style formatting including uppercase and braces ({...}).
Frequently Asked Questions
›What's the difference between a GUID and a UUID?
They're the same thing. GUID (Globally Unique Identifier) is Microsoft's term, UUID (Universally Unique Identifier) is the RFC 4122 standard term. Both refer to 128-bit identifiers in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
›Why does .NET use braces around GUIDs?
Microsoft's Guid.ToString() defaults to lowercase without braces, but the 'B' format specifier wraps it in braces: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}. This is common in Windows registries, COM, and .NET configuration files.
›Can I use this for .NET or SQL Server?
Yes. Generate a GUID, choose the format you need (braces for .NET config, uppercase for SQL Server uniqueidentifier), and paste it directly into your code or query.