TULKIT

UUID Generator - Generate UUID/GUID Online Free

Generate unique UUID (Universally Unique Identifier) version 4 instantly. Create single or bulk UUIDs for databases, API keys, session tokens, and unique identifiers. Each UUID is cryptographically random and globally unique.

Why Use UUID Generator?

  • Globally Unique: Collision probability is virtually zero
  • Bulk Generation: Create up to 1000 UUIDs at once
  • Multiple Formats: Standard, uppercase, braces, no hyphens
  • Standards Compliant: RFC 4122 UUID version 4

Common Use Cases

💾 Database Records

Use as primary keys in distributed databases.

🔑 API Keys

Generate unique identifiers for API authentication.

🎫 Session Tokens

Create secure session identifiers for web apps.

📁 File Names

Generate unique file names to prevent conflicts.

How to Use This Tool

  1. Choose Quantity: Select how many UUIDs you need (1-1000).
  2. Select Format: Choose your preferred UUID format.
  3. Generate: Click generate to create your UUIDs instantly.

💡 Tip: UUIDs are perfect for distributed systems where coordination is difficult.

UUID/GUID Generator

What is a UUID?

A UUID (Universally Unique Identifier), also known as GUID (Globally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems. The probability of generating duplicate UUIDs is so low it's effectively zero.

UUID Format

A standard UUID v4 looks like this:

550e8400-e29b-41d4-a716-446655440000

It consists of 32 hexadecimal digits displayed in 5 groups separated by hyphens:

  • 8 digits - 4 digits - 4 digits - 4 digits - 12 digits
  • Total: 36 characters (32 alphanumeric + 4 hyphens)

UUID Versions

UUID v1

Based on timestamp and MAC address. Predictable and can expose system information.

UUID v4

Random generation. Most commonly used. This tool generates v4 UUIDs.

UUID v3/v5

Generated from namespace and name using MD5 (v3) or SHA-1 (v5) hashing.

UUID v6/v7/v8

Newer versions with improved sorting and timestamp features.

Format Examples

Standard: a3bb189e-8bf9-3888-9912-ace4e6543002
Uppercase: A3BB189E-8BF9-3888-9912-ACE4E6543002
With Braces: {a3bb189e-8bf9-3888-9912-ace4e6543002}
No Hyphens: a3bb189e8bf938889912ace4e6543002

Advantages of UUIDs

  • Decentralized: Generate without coordination with a central authority
  • Mergeable: Merge databases without ID conflicts
  • Predictable Size: Always 128 bits (16 bytes)
  • Non-Sequential: Harder to guess or enumerate
  • Cross-Platform: Works across all programming languages

Common Programming Languages

JavaScript:

crypto.randomUUID()

Python:

import uuid
uuid.uuid4()

Java:

UUID.randomUUID()

C#:

Guid.NewGuid()

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