UUID Generator — Generate UUID v4, v7 & GUIDs in Bulk
Cryptographically secure UUIDs generated in your browser. Up to 1,000 at a time, in any format.
Quick answer
To generate a UUID, open the KaviForge UUID Generator — 10 random UUID v4 values are created immediately. Choose UUID v7 for time-ordered IDs that sort well as database keys, set how many you need (up to 1,000), pick uppercase, no hyphens, or braces, then copy or download them.
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier written as 32 hexadecimal digits in the 8-4-4-4-12 format. UUIDs can be generated anywhere without coordination and are practically guaranteed to be unique.
Version 4 UUIDs are fully random. Version 7 UUIDs (RFC 9562) start with a millisecond timestamp, so they are unique and sortable by creation time — ideal for database primary keys.
How to Generate UUIDs
- 1Choose the version: UUID v4 (random), UUID v7 (time-ordered), or the Nil UUID.
- 2Enter how many UUIDs you need, from 1 to 1,000.
- 3Click "Generate" to create a fresh batch.
- 4Toggle uppercase, hyphens, or braces to match your required format.
- 5Click "Copy all" or download the list as a .txt file.
Features
UUID v4 & v7
Random v4 and time-ordered v7 UUIDs following RFC 9562.
Bulk Generation
Generate up to 1,000 UUIDs in one click.
Format Options
Uppercase, lowercase, with or without hyphens, and {braces} for GUIDs.
Cryptographically Secure
Uses the browser’s crypto.randomUUID and crypto.getRandomValues.
UUID Validator
Check any UUID/GUID and see its version, variant, and v7 timestamp.
Copy & Download
Copy the whole list or save it as a text file.
When to Use the UUID Generator
Database primary keys
Use UUID v7 for keys that are globally unique and index-friendly.
Test data and fixtures
Generate hundreds of IDs to seed databases or mock API responses.
Idempotency keys and request IDs
Attach a unique ID to API requests, events, or log correlation.
.NET and Windows GUIDs
Enable uppercase and braces for the {XXXXXXXX-…} GUID format.
About the UUID Generator
UUID v4 uses 122 random bits, so the chance of a collision is negligible even across billions of IDs. UUID v7 stores a 48-bit Unix millisecond timestamp followed by random bits.
All UUIDs are generated locally with the Web Crypto API. They are never sent to or stored on a server.
UUID Generator FAQs
How do I generate a UUID online?
Open the KaviForge UUID Generator. Ten UUID v4 values are generated automatically; click "Generate" for more or change the count and version.
What is the difference between UUID v4 and UUID v7?
UUID v4 is completely random. UUID v7 begins with a timestamp, so values sort in creation order, which improves database index performance.
Is a GUID the same as a UUID?
Yes. GUID is Microsoft’s name for a UUID. Enable uppercase and braces to get the typical Windows GUID format.
Can UUIDs collide?
In practice, no. With 122 random bits, you would need to generate billions of UUIDs per second for many years to have a meaningful chance of a duplicate.
Are these UUIDs secure?
They are generated with the browser’s cryptographically secure random number generator. Still, UUIDs are identifiers, not secrets — do not use them as passwords.
How many UUIDs can I generate at once?
Up to 1,000 per batch. Generate multiple batches if you need more.
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