Developer
GUID Generator Online
- Browser-based
- No signup
This GUID generator online creates globally unique identifiers in standard UUID format for Windows-style APIs, .NET apps, and cross-platform databases. Generate random GUIDs locally and copy them into configs, SQL scripts, and test fixtures.
GUID and UUID refer to the same 128-bit identifier format—only naming differs by ecosystem.
Use version 4 random GUIDs unless your platform requires time-ordered v7 or COMB patterns.
100% Client-Side
Your data never leaves your computer.
How to use this tool
Click generate, copy the GUID string, and paste into your application, database migration, or mock API response.
Worked example
Example: generate `a3f2c1b0-9d8e-4f7a-b6c5-d4e3f2a1b0c9` for a SQL Server `uniqueidentifier` column seed script.
When to use this
- Seeding .NET or SQL Server development databases.
- Creating placeholder IDs in Swagger examples.
- Generating correlation IDs for log demos.
Common examples
- Generate v4 UUID for a new database primary key in local seed scripts.
- Batch of five UUIDs for mock API fixtures in integration tests.
- UUID for trace id in log correlation examples in documentation.
- Ten UUID v4 values → seed rows for local integration test database.
- UUID v7 batch → ordered IDs for event-sourcing demo data.
What people search for
- uuid generator
- generate uuid v4
- random uuid online
- guid generator
- unique id generator
Common mistakes
- Using GUID strings where integers would index faster.
- Assuming GUIDs embed MAC addresses—modern v4 random GUIDs do not.
- Reusing the same GUID across production and staging.
Related long-tail tasks
- uuid v4 generator random
- guid without braces format
- bulk guid generator copy list
How it works
Choose UUID version 4 (random) or version 7 (time-ordered), how many to generate, and formatting options. UUIDs are created in your browser with the Web Crypto API and are not stored or sent to a server.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Related UUID Generator guides
These pages use the same uuid generator with guides tailored to specific search intents.
Frequently asked questions
Is GUID the same as UUID?
Yes. GUID is Microsoft's term for the RFC 4122 UUID format.
Uppercase or lowercase GUIDs?
Both are valid. SQL Server often displays uppercase; JSON APIs may prefer lowercase.
Can I generate multiple GUIDs?
Use bulk generation on the base UUID tool when you need many IDs at once.
Related tools
Related pages
- Browse all free online tools on Utilnivo
- Explore more developer tools on Utilnivo
- UUID Generator — Generate UUIDs for apps, tests, and databases.
- UUID Lookup — Inspect UUID version, variant, and embedded timestamps.
- Password Generator — Generate secure random passwords with customizable length and character sets.
- JSON Formatter — Format, minify, and validate JSON with optional key sorting.
- JSON Compare — Compare two JSON documents and list structural differences.
- XML Formatter — Format, minify, and validate XML with readable indentation.
Page last reviewed: