Fake Company Generator
Generate believable company names, domains and details for mockups.
UUID Generator
Generate cryptographically random version 4 UUIDs in bulk.
Version 4 UUIDs generated with your browser's cryptographic random source. Click any line below to copy it on its own.
Quick Tool Overview
The UUID Generator produces version 4 UUIDs — 128-bit identifiers written as 32 hexadecimal digits in five hyphen-separated groups. The randomness comes from the browser's cryptographic random number generator, so the output is suitable for real identifiers rather than throwaway test data.
- What it does
- Generates cryptographically random version 4 UUIDs
- You give it
- How many you need and the format you want
- You get back
- Up to 1,000 UUIDs ready to copy
- Best for
- Primary keys, request IDs, test fixtures and seed data
About the UUID Generator
A UUID is a 128-bit identifier written as 32 hexadecimal digits in five hyphen-separated groups. Version 4 UUIDs are almost entirely random, which means two systems can mint identifiers independently without coordinating and still never collide in practice.
The randomness here comes from the browser's cryptographic random number generator, not from Math.random, so the output is suitable for real identifiers rather than throwaway test data. Generate up to a thousand at a time, switch to uppercase, or strip the hyphens for systems that store UUIDs as a plain 32-character string.
Key features of the UUID Generator
Cryptographic randomness
Values come from the browser's secure random source, not Math.random, so they are safe to use as real identifiers.
Bulk generation
Produce up to a thousand at a time instead of refreshing a page for each one.
Uppercase option
Match systems and databases that store UUIDs in uppercase.
Hyphens optional
Strip the hyphens for systems that keep UUIDs as a plain 32-character string.
No collisions in practice
Version 4 UUIDs are random enough that independent systems can mint them without coordinating.
How to use the UUID Generator
-
1
Set how many you need
Enter a quantity from 1 to 1000.
-
2
Pick a format
Choose uppercase or lowercase, and whether to include the hyphens.
-
3
Generate and copy
Click generate, then copy the whole list or download it as a text file.
Frequently asked questions
In theory yes, in practice no. A version 4 UUID has 122 random bits. You would need to generate around a billion UUIDs per second for roughly 85 years to reach a 50 percent chance of a single collision.
None of substance. GUID is the name Microsoft uses for the same 128-bit identifier format. The two terms are interchangeable.
Yes, they are generated with the browser crypto API rather than a weak pseudo-random source. Note that random UUIDs as clustered primary keys can fragment an index, so many teams prefer them as external identifiers alongside an auto-increment key.
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