UUID Generator

How to Use the UUID Generator

1. Select the ID type: UUID v4 (random), UUID v1 (time-based), ULID, NanoID, or Custom ID.
2. Set the number of IDs to generate (1–100).
3. For NanoID, adjust the length slider. For Custom ID, choose length and charset.
4. Click "Generate" to create new identifiers.
5. Click the clipboard icon next to any ID to copy it, or "Copy All" to copy the entire batch.

Technical Overview & Use Cases

This generator uses the Web Crypto API (crypto.getRandomValues) for cryptographically secure random number generation. UUID v4 follows RFC 4122, ULID is lexicographically sortable, and NanoID offers compact URL-safe identifiers.

Real-world use cases:

• Database primary keys and unique record identifiers.
• Session tokens and correlation IDs for distributed systems.
• File naming and cache-busting keys in web applications.
• Testing and mocking unique data for development environments.

Privacy & Security Guarantee

This tool is part of the FAK LAB ecosystem, founded by Faizan Ahmad Khan Khichi. All ID generation is performed 100% client-side using browser cryptography. No data is ever stored or shared.

Frequently Asked Questions

Are the generated UUIDs truly random?

Yes. They use the browser's cryptographic random number generator, which provides the same security level as server-side generation.

What is the difference between UUID v4 and ULID?

UUID v4 is purely random. ULID includes a timestamp prefix making it lexicographically sortable, which is useful for database indexing.

Can I generate UUIDs in bulk?

Yes. Set the count up to 100 and click Generate. Use "Copy All" to get them all at once.