How To
How to Generate a UUID Online
Generate RFC 4122-compliant UUID v4 identifiers in your browser using the Web Crypto API.
UUIDs (Universally Unique Identifiers) are 128-bit IDs used as primary keys in databases and unique identifiers in distributed systems. UUID v4 uses random numbers.
Step-by-Step Guide
1
Open FileCraft UUID Generator
Go to filecraft.tools/uuid-generator.
2
Click Generate
A new UUID v4 is generated using the browser's cryptographically secure random number generator.
3
Copy the UUID
Click Copy or press Ctrl+C to copy the UUID to clipboard.
4
Generate bulk UUIDs
Enter a count and generate 10, 100, or 1000 UUIDs at once for batch database seeding.
Try it now — free, no account, no upload
Open Uuid Generator →Pro Tips
- 💡UUID v4 format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (where y is 8, 9, A, or B)
- 💡The probability of a UUID collision is astronomically small — UUIDs are safe to use without centralized coordination
Frequently Asked Questions
What is the difference between UUID v4 and UUID v1?
UUID v4 is randomly generated and the most privacy-safe. UUID v1 includes a timestamp and MAC address, which can reveal when and where it was generated.