UUID Generator

Generate unique UUIDs (v4) instantly

Developer Tools

How to Use UUID Generator

  1. 1Choose how many UUIDs you want to generate (1–100)
  2. 2Click "Generate" to create the UUIDs
  3. 3Click any UUID to copy it individually
  4. 4Use "Copy All" to copy all generated UUIDs
  5. 5Toggle uppercase/lowercase formatting as needed

About UUID Generator

UUID (Universally Unique Identifier) is a 128-bit label used for identifying information in computer systems. Our UUID Generator creates RFC 4122 compliant version 4 UUIDs using cryptographically random values.

UUIDs are widely used as database primary keys, session tokens, and unique identifiers in distributed systems where conflicts must be avoided.

Key Features of UUID Generator

  • Fast and accurate Uuid Generator processing
  • No installation required — works in browser
  • Free to use with no limitations
  • Privacy-focused — data never leaves your device
  • Mobile and desktop compatible
  • Instant results with live preview
  • No server calls — generation is entirely client-side

Examples

Single UUID v4

Standard format used in most frameworks and databases.

Input

Generate 1 UUID

Output

f47ac10b-58cc-4372-a567-0e02b2c3d479

Uppercase UUID for Windows GUID

Windows registry and COM use uppercase GUIDs.

Input

Generate 1 UUID (uppercase)

Output

F47AC10B-58CC-4372-A567-0E02B2C3D479

Common Use Cases

  • Professional Uuid Generator tasks
  • Quick everyday calculations
  • Educational purposes and learning
  • Business and workplace productivity
  • Personal projects and hobbies
  • Test fixture IDs when seeding development databases

Troubleshooting

Unexpected results

Solution

Double-check your input format and ensure all required fields are filled correctly.

Tool not working

Solution

Clear browser cache and refresh. Ensure JavaScript is enabled.

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify objects in computer systems. UUID v4 is randomly generated.

Are these UUIDs truly unique?

UUID v4 values are randomly generated with 122 bits of randomness, making the probability of collision astronomically small.

What is the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's name for the same concept. Both follow the same RFC 4122 standard format.

Should I store UUIDs with or without hyphens?

Most databases have a native UUID type that stores the value efficiently. As strings, the hyphenated format (8-4-4-4-12) is standard and most readable.

Is UUID v4 secure enough for tokens?

UUID v4 provides 122 bits of entropy, which is sufficient for most use cases. For high-security tokens, consider using 256-bit random bytes instead.

Can I use UUIDs as API keys?

Yes, but consider using a prefix (e.g., sk_live_<uuid>) so your team can identify the type and origin of a key at a glance.