GUIDType
A globally unique identifier generated from cryptographically secure random bytes. It is simple to use, privacy-friendly and widely supported.
Useful for Windows development, database primary keys, distributed systems and API correlation IDs.
Output format
Batch generate
to create a unique identifier
GUID Generator
This GUID generator creates RFC 4122 version 4 compatible identifiers directly in your browser. Use it for Windows development, database keys, distributed systems, API correlation IDs and local test data without sending generated values to a server.
What it does
Secure random values
Uses the browser Web Crypto API to produce 122 bits of random entropy and set the UUID v4 version and variant bits correctly.
Common GUID formats
Generate standard lowercase GUIDs, uppercase values, compact no-hyphen strings, Windows-style braces and parentheses formats from the same random source.
Batch generation
Create between 1 and 1000 GUID values at a time, then copy one result or the full batch for fixtures, migrations or integration tests.
Privacy note
GUID values are generated locally in the browser. The generated identifiers are not uploaded to just top tools or any domestic backend service.
How to use
Choose a format
Select standard, uppercase, no-hyphen, braces or parentheses output depending on where the identifier will be pasted.
Set the quantity
Keep the count at 1 for a single identifier or enter a batch size up to 1000 values.
Generate and copy
Click Generate GUID, review the output, then copy one GUID or the complete batch.
FAQ
Is a GUID the same as a UUID?
In most developer workflows, GUID and UUID refer to the same 128-bit identifier format. This tool generates UUID v4 compatible GUID values.
Can I use these values as database primary keys?
Yes, GUIDs are commonly used as distributed primary keys. For high-write databases, consider index fragmentation and storage tradeoffs before choosing a random key strategy.
Are generated GUID values secret?
No. They are random identifiers, not authentication secrets. Use a dedicated cryptographic token generator for passwords, session secrets or API credentials.