GUID Generator — Generate Globally Unique Identifiers

Tool processing happens entirely in your browser. Your input is never sent to our servers.

Version

Count

Format

UUID Validator

Paste a UUID to check validity and detect its version.

NIL UUID:00000000-0000-0000-0000-000000000000

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GUIDs in .NET and Microsoft Development

GUID (Globally Unique Identifier) is Microsoft's name for what the rest of the industry calls UUID (Universally Unique Identifier). They are the same thing: 128-bit identifiers in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.

GUIDs in .NET/C#: In C#, you create GUIDs with Guid.NewGuid() which generates a random (v4) GUID. The .NET framework formats GUIDs with braces by default: {3F2504E0-4F89-11D3-9A0C-0305E82C3301}. Our tool supports this format.

Common GUID uses in Microsoft ecosystems:

Primary keys in SQL Server databases
COM component identifiers
Assembly identifiers in .NET
Windows Registry keys
SharePoint and Azure resource identifiers

GUID formats:

Standard: 3f2504e0-4f89-11d3-9a0c-0305e82c3301
Braces: {3F2504E0-4F89-11D3-9A0C-0305E82C3301}
No hyphens: 3F2504E04F8911D39A0C0305E82C3301
Uppercase: convention in .NET; lowercase: convention in most other platforms

Whether you call it a UUID or a GUID, the generation algorithm is identical. This tool generates cryptographically secure identifiers using the Web Crypto API, suitable for any platform.

For working with GUIDs in API payloads, the JSON Formatter helps validate your JSON structure. To encode GUIDs for URL parameters, use the URL Encoder/Decoder.

How to Use This GUID Generator

Paste or type your input in the editor above
Click the action button or the tool will process automatically
View the result in the output panel
Copy the result with one click using the Copy button

Frequently Asked Questions

GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are identical 128-bit identifiers. GUIDs are commonly used in .NET, C#, SQL Server, and Windows development.

Yes. The tool offers a braces format option that wraps GUIDs in curly braces: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}. This is the format commonly used in C# and .NET code.

It uses the exact same generation engine. This page targets developers searching for "GUID" (the Microsoft term) while the UUID Generator targets the standard term. Both produce identical identifiers.