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UUID Generator

Generate UUIDs (Universally Unique Identifiers) in various formats.

UUID Generator

Generate unique identifiers in various formats

Randomly generated UUID

Generated UUIDs

Generated UUIDs will appear here...

UUID Information

Version
V4
Format
standard
Count
0
Case
lower

About UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUIDs are commonly used in software development for database records, API endpoints, and distributed systems.

Version 4Randomly generated UUIDs
Version 1Time-based UUIDs
Version 3/5Name-based UUIDs
FormatsStandard, Braced, URN, Base64, Binary

About UUID Generator

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is designed to be unique across space and time. Also known as a GUID (Globally Unique Identifier) in some contexts, UUIDs are standardized identifiers that follow the RFC 4122 specification. These identifiers are commonly used in software development, databases, distributed systems, and various applications where unique identification is crucial. The probability of generating duplicate UUIDs is astronomically low, making them virtually guaranteed to be unique when properly implemented.

How UUIDs Work

UUIDs are structured as 32 hexadecimal digits displayed in five groups separated by hyphens, following the pattern 8-4-4-4-12 characters (e.g., 550e8400-e29b-41d4-a716-446655440000). Each UUID contains specific information depending on its version, including timestamp data, node identifiers, clock sequences, and random values. The structure ensures that UUIDs generated at different times, on different machines, or by different processes remain unique. This makes UUIDs ideal for distributed systems where centralized ID generation is impractical or impossible.

Common Uses for UUIDs

Database Primary Keys

UUIDs are widely used as primary keys in databases, especially in distributed systems where auto-incrementing IDs can cause conflicts. They eliminate the need for coordination between database nodes and allow for offline record creation.

API Endpoints

REST APIs and GraphQL services often use UUIDs to identify resources. This provides security through obscurity and prevents enumeration attacks while maintaining unique identification across distributed systems.

File Identifiers

Many file systems and cloud storage services use UUIDs to identify files and directories. This ensures unique identification even when files are moved, renamed, or accessed from different locations.

Session Management

Web applications use UUIDs for session tokens, authentication tokens, and user session management. This provides secure, unique identifiers that are difficult to guess or forge.

Message Queues

Distributed messaging systems use UUIDs to track messages across multiple services and ensure message deduplication. This is crucial for maintaining data consistency in event-driven architectures.

Configuration Management

Software configuration management systems use UUIDs to track configuration versions, deployment identifiers, and environment-specific settings across multiple deployment targets.

UUID Version Types and Characteristics

The UUID specification defines five different versions, each with specific use cases and characteristics. Understanding these versions helps developers choose the most appropriate UUID type for their applications.

Version 1 (Time-based)
  • • Generated using current timestamp and MAC address
  • • Includes clock sequence for uniqueness
  • • Sortable by creation time
  • • May reveal machine information
  • • Best for: Time-ordered data, audit trails
Version 4 (Random)
  • • Generated using cryptographically secure random numbers
  • • No predictable pattern or information
  • • Highest level of uniqueness
  • • Not sortable by time
  • • Best for: General purpose, security-focused applications
Version 3 (MD5 Hash-based)
  • • Generated from namespace UUID and name using MD5
  • • Deterministic - same input produces same UUID
  • • Useful for name-based identification
  • • MD5 considered cryptographically weak
  • • Best for: Legacy systems, name-based identification
Version 5 (SHA-1 Hash-based)
  • • Generated from namespace UUID and name using SHA-1
  • • Deterministic - same input produces same UUID
  • • More secure than Version 3
  • • Widely used for name-based identification
  • • Best for: Modern name-based identification systems

Understanding UUID Formats and Representations

Standard Format (8-4-4-4-12)

The most common UUID format displays 32 hexadecimal characters in five groups separated by hyphens: 550e8400-e29b-41d4-a716-446655440000. This format is human-readable and widely supported across programming languages and databases. The grouping structure helps with visual parsing and validation while maintaining the full 128-bit identifier.

Braced Format

Braced UUIDs are enclosed in curly braces: {550e8400-e29b-41d4-a716-446655440000}. This format is commonly used in Microsoft technologies and some database systems. The braces help distinguish UUIDs from other hexadecimal strings and provide additional visual separation in documents and code.

URN Format

URN (Uniform Resource Name) format includes the "urn:uuid:" prefix: urn:uuid:550e8400-e29b-41d4-a716-446655440000. This format is used in XML documents, web services, and other contexts where URNs are required. It provides a standardized way to reference UUIDs as resources.

Base64 Format

Base64 encoding represents the 128-bit UUID as a shorter string using 64 characters. This format is useful for URL-safe identifiers, compact storage, and situations where shorter strings are preferred. Base64 UUIDs are approximately 22 characters long and maintain the same uniqueness properties.

Binary Format

Binary format represents the UUID as 16 bytes without any formatting characters. This is the most compact representation and is used in database storage, network protocols, and binary file formats. Binary UUIDs require special handling for display and human interaction.

UUID Namespaces and Standards

Predefined Namespaces
  • • DNS: 6ba7b810-9dad-11d1-80b4-00c04fd430c8
  • • URL: 6ba7b811-9dad-11d1-80b4-00c04fd430c8
  • • OID: 6ba7b812-9dad-11d1-80b4-00c04fd430c8
  • • X.500 DN: 6ba7b814-9dad-11d1-80b4-00c04fd430c8
Custom Namespaces
  • • Application-specific namespaces
  • • Organization-specific identifiers
  • • Domain-specific UUID generation
  • • Hierarchical identification systems

Security Considerations for UUID Usage

While UUIDs provide unique identification, they are not inherently secure and should not be used as security tokens without additional measures. Understanding security implications is crucial for proper implementation.

Version 1 Security Issues
  • • MAC address exposure in UUID
  • • Timestamp information leakage
  • • Potential for tracking and profiling
  • • Clock sequence predictability
Version 4 Security Benefits
  • • No predictable information
  • • Cryptographically secure randomness
  • • No machine or time information
  • • Suitable for security-sensitive applications

Performance and Storage Considerations

UUIDs have specific performance characteristics that impact database design, storage requirements, and application performance. Understanding these considerations helps optimize system design.

Storage Requirements
  • • 16 bytes binary storage
  • • 36 characters string storage (with hyphens)
  • • 32 characters string storage (without hyphens)
  • • Index size considerations
Performance Impact
  • • Larger index sizes compared to integers
  • • Slower comparison operations
  • • Random access patterns
  • • Cache efficiency considerations

Best Practices for UUID Implementation

Following established best practices ensures reliable UUID generation and proper integration into your applications. These guidelines help avoid common pitfalls and improve system reliability.

Generation Guidelines
  • • Use cryptographically secure random generators
  • • Validate UUID format before storage
  • • Handle generation errors gracefully
  • • Consider time-based UUIDs for ordering
Database Integration
  • • Use native UUID data types when available
  • • Index UUID columns appropriately
  • • Consider clustering strategies
  • • Monitor index performance

UUID Validation and Verification

Proper UUID validation ensures data integrity and prevents errors in applications. Understanding validation techniques helps maintain system reliability and user experience.

Format Validation
  • • Check character set (hexadecimal)
  • • Verify hyphen placement
  • • Validate length requirements
  • • Check version and variant bits
Content Validation
  • • Verify version number validity
  • • Check variant bits compliance
  • • Validate namespace UUIDs
  • • Ensure proper bit patterns

Using Our UUID Generator Tool

Our comprehensive UUID generator provides multiple options for creating UUIDs tailored to your specific needs. Whether you need random UUIDs for general use, time-based UUIDs for ordered data, or name-based UUIDs for deterministic generation, our tool offers the flexibility to generate UUIDs in various formats and versions. The tool supports all major UUID versions (1, 3, 4, and 5) and multiple output formats including standard, braced, URN, Base64, and binary representations.

The generator includes features for bulk UUID generation, allowing you to create multiple UUIDs simultaneously for testing, development, or production use. You can specify the exact number of UUIDs needed, choose between uppercase and lowercase output, and select from predefined namespaces for version 3 and 5 UUIDs. The tool also provides copy-to-clipboard functionality and download options for easy integration into your development workflow.

Whether you're developing a distributed system, setting up a database schema, creating API endpoints, or working on any application requiring unique identifiers, our UUID generator provides the tools you need to create reliable, standardized UUIDs that meet your specific requirements. The comprehensive information and multiple generation options ensure you can make informed decisions about UUID usage in your projects.

Frequently Asked Questions

What is a UUID Generator?
A UUID Generator creates Universally Unique Identifiers (UUIDs), which are 128-bit identifiers that are virtually guaranteed to be unique across space and time. They're used in software development for database keys, API endpoints, and distributed systems.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. It's typically represented as 32 hexadecimal digits displayed in 5 groups separated by hyphens: 550e8400-e29b-41d4-a716-446655440000 .
What are the different UUID versions?
UUID versions include: Version 1 (time-based), Version 2 (DCE security), Version 3 (MD5 hash), Version 4 (random), Version 5 (SHA-1 hash). Version 4 is most commonly used for generating random UUIDs.
What is the difference between UUID and GUID?
UUID and GUID are essentially the same thing. UUID stands for Universally Unique Identifier, while GUID stands for Globally Unique Identifier. GUID is Microsoft's implementation of the UUID standard.
How do I generate a UUID in JavaScript?
Use crypto.randomUUID() (modern browsers): const uuid = crypto.randomUUID(); Or use a library like uuid: import { v4 as uuidv4 } from 'uuid'; const uuid = uuidv4(); For older browsers, use crypto.getRandomValues().
How do I generate a UUID in Python?
Use the uuid module: import uuid; uuid_str = str(uuid.uuid4()) for random UUID, uuid.uuid1() for time-based UUID. For specific versions: uuid.uuid3(uuid.NAMESPACE_DNS, 'example.com') for version 3.
What is the probability of UUID collision?
The probability of collision is extremely low. With 2^122 possible UUIDs, you'd need to generate about 2.71 quintillion UUIDs to have a 50% chance of collision. This makes UUIDs practically unique for most applications.
What is the difference between UUID v1 and v4?
UUID v1 uses timestamp and MAC address, making it time-ordered but potentially predictable. UUID v4 uses random numbers, making it unpredictable but not time-ordered. V4 is preferred for most applications due to privacy concerns with v1.
How do I validate a UUID?
Check format: 8-4-4-4-12 hexadecimal digits with hyphens. Use regex: /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i . Most programming languages have built-in UUID validation.
What is the difference between UUID and auto-increment ID?
Auto-increment IDs are sequential numbers (1, 2, 3...) that are predictable and require coordination in distributed systems. UUIDs are globally unique, can be generated independently, and don't reveal information about creation order or volume.
How do I generate a UUID in Java?
Use java.util.UUID: UUID uuid = UUID.randomUUID(); String uuidString = uuid.toString(); For specific versions: UUID.nameUUIDFromBytes() for v3, or use libraries like Apache Commons Lang for other versions.
What is the difference between UUID and ULID?
UUID is 128-bit with 36 characters, ULID is 128-bit with 26 characters. ULID is time-ordered and URL-safe, while UUID can be random or time-based. ULID is more compact and sortable, UUID is more widely supported.
How do I generate a UUID in C#?
Use System.Guid: Guid uuid = Guid.NewGuid(); string uuidString = uuid.ToString(); For parsing: Guid parsed = Guid.Parse('uuid-string'); For validation: bool isValid = Guid.TryParse('uuid-string', out Guid result) .
What is the difference between UUID and hash?
UUID is designed to be unique and random, while hash is designed to be deterministic (same input always produces same output). UUIDs are not reversible, hashes are one-way functions. UUIDs are for identification, hashes are for data integrity.
How do I generate a UUID in PHP?
Use random_bytes() and bin2hex(): $uuid = sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x', ...array_map('bin2hex', str_split(random_bytes(16), 4))); Or use libraries like ramsey/uuid: $uuid = Uuid::uuid4()->toString();
What is the difference between UUID and database ID?
Database IDs are typically auto-incrementing integers managed by the database. UUIDs are application-generated identifiers that can be created before database insertion. UUIDs work better in distributed systems and microservices.
How do I generate a UUID in Go?
Use crypto/rand and encoding/hex: import 'crypto/rand'; import 'encoding/hex'; b := make([]byte, 16); rand.Read(b); uuid := fmt.Sprintf('%x-%x-%x-%x-%x', b[0:4], b[4:6], b[6:8], b[8:10], b[10:16]) . Or use github.com/google/uuid library.
What is the difference between UUID and session ID?
UUID is a general-purpose unique identifier that can be used for any purpose. Session ID is specifically for identifying user sessions and may have different security requirements. Session IDs can be UUIDs but don't have to be.
How do I generate a UUID in Ruby?
Use SecureRandom: require 'securerandom'; uuid = SecureRandom.uuid . Or use the uuid gem: require 'uuid'; uuid = UUID.generate . For specific versions, use libraries like uuidtools.
What is the difference between UUID and API key?
UUID is a general identifier that can be used for any purpose. API key is specifically for authentication and authorization, often with additional security measures like expiration and rate limiting. API keys can be UUIDs but serve different purposes.
How do I generate a UUID in Rust?
Use the uuid crate: use uuid::Uuid; let uuid = Uuid::new_v4(); let uuid_string = uuid.to_string(); For specific versions: Uuid::new_v1() for time-based, Uuid::new_v3() for MD5 hash-based, Uuid::new_v5() for SHA-1 hash-based .
What is the difference between UUID and Snowflake ID?
UUID is 128-bit and globally unique, Snowflake ID is 64-bit and time-ordered. Snowflake IDs are more compact, sortable, and include timestamp information. UUIDs are more widely supported and truly globally unique.
How do I generate a UUID in Swift?
Use Foundation framework: import Foundation; let uuid = UUID(); let uuidString = uuid.uuidString . For parsing: if let uuid = UUID(uuidString: 'uuid-string') { /* valid UUID */ } . For validation: UUID(uuidString: 'uuid-string') != nil .
What is the difference between UUID and MongoDB ObjectId?
UUID is 128-bit and globally unique, ObjectId is 96-bit and includes timestamp, machine ID, and counter. ObjectIds are more compact and time-ordered, UUIDs are more widely supported and truly globally unique.
How do I generate a UUID in Kotlin?
Use java.util.UUID: import java.util.UUID; val uuid = UUID.randomUUID(); val uuidString = uuid.toString() . For specific versions: UUID.nameUUIDFromBytes() for v3, or use libraries like Apache Commons Lang for other versions.
What is the difference between UUID and CUID?
UUID is 128-bit with 36 characters, CUID is variable length with 25+ characters. CUID is time-ordered, URL-safe, and collision-resistant. CUID is more compact and sortable, UUID is more widely supported.
How do I generate a UUID in TypeScript?
Use crypto.randomUUID() (modern browsers): const uuid = crypto.randomUUID(); Or use a library like uuid: import { v4 as uuidv4 } from 'uuid'; const uuid = uuidv4(); For older browsers, use crypto.getRandomValues().
What is the difference between UUID and Nano ID?
UUID is 128-bit with 36 characters, Nano ID is variable length with customizable alphabet. Nano ID is more compact and customizable, UUID is more widely supported and truly globally unique. Nano ID is better for URLs and user-facing IDs.
How do I generate a UUID in Dart?
Use the uuid package: import 'package:uuid/uuid.dart'; final uuid = Uuid(); String uuidString = uuid.v4(); For specific versions: uuid.v1() for time-based, uuid.v3() for MD5 hash-based, uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and KSUID?
UUID is 128-bit with 36 characters, KSUID is 160-bit with 27 characters. KSUID is time-ordered, URL-safe, and includes timestamp information. KSUID is more compact and sortable, UUID is more widely supported.
How do I generate a UUID in Elixir?
Use the uuid library: {:uuid, '~> 1.1'}; UUID.uuid4() for random UUID, UUID.uuid1() for time-based UUID. For specific versions: UUID.uuid3() for MD5 hash-based, UUID.uuid5() for SHA-1 hash-based .
What is the difference between UUID and XID?
UUID is 128-bit with 36 characters, XID is 96-bit with 20 characters. XID is time-ordered, URL-safe, and includes machine ID. XID is more compact and sortable, UUID is more widely supported and truly globally unique.
How do I generate a UUID in Haskell?
Use the uuid library: import Data.UUID; import Data.UUID.V4; uuid <- nextRandom; let uuidString = toString uuid . For specific versions, use functions like uuid3, uuid5 for hash-based UUIDs.
What is the difference between UUID and Flake ID?
UUID is 128-bit and globally unique, Flake ID is 64-bit and time-ordered. Flake IDs are more compact, sortable, and include timestamp information. UUIDs are more widely supported and truly globally unique.
How do I generate a UUID in Scala?
Use java.util.UUID: import java.util.UUID; val uuid = UUID.randomUUID(); val uuidString = uuid.toString . For specific versions: UUID.nameUUIDFromBytes() for v3, or use libraries like Apache Commons Lang for other versions.
What is the difference between UUID and ULID?
UUID is 128-bit with 36 characters, ULID is 128-bit with 26 characters. ULID is time-ordered and URL-safe, while UUID can be random or time-based. ULID is more compact and sortable, UUID is more widely supported.
How do I generate a UUID in Clojure?
Use the uuid library: (require '[clojure.string :as str]); (defn generate-uuid [] (str (java.util.UUID/randomUUID))) . For specific versions, use functions like uuid/v1, uuid/v3, uuid/v4, uuid/v5 .
What is the difference between UUID and Timeflake?
UUID is 128-bit and globally unique, Timeflake is 64-bit and time-ordered. Timeflakes are more compact, sortable, and include timestamp information. UUIDs are more widely supported and truly globally unique.
How do I generate a UUID in F#?
Use System.Guid: open System; let uuid = Guid.NewGuid(); let uuidString = uuid.ToString() . For parsing: let parsed = Guid.Parse('uuid-string') . For validation: let isValid = Guid.TryParse('uuid-string', &result) .
What is the difference between UUID and Sortable ID?
UUID is 128-bit and globally unique, Sortable ID is variable length and time-ordered. Sortable IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Sortable IDs are better for database indexing.
How do I generate a UUID in Erlang?
Use the uuid library: uuid:uuid4() for random UUID, uuid:uuid1() for time-based UUID . For specific versions: uuid:uuid3() for MD5 hash-based, uuid:uuid5() for SHA-1 hash-based .
What is the difference between UUID and Push ID?
UUID is 128-bit with 36 characters, Push ID is 20 characters and time-ordered. Push IDs are more compact, sortable, and include timestamp information. UUIDs are more widely supported and truly globally unique.
How do I generate a UUID in Groovy?
Use java.util.UUID: import java.util.UUID; def uuid = UUID.randomUUID(); def uuidString = uuid.toString() . For specific versions: UUID.nameUUIDFromBytes() for v3, or use libraries like Apache Commons Lang for other versions .
What is the difference between UUID and Ordered ID?
UUID is 128-bit and globally unique, Ordered ID is variable length and time-ordered. Ordered IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Ordered IDs are better for database performance.
How do I generate a UUID in Lua?
Use the uuid library: local uuid = require('uuid'); local uuidString = uuid.generate() . For specific versions: uuid.generate_v1() for time-based, uuid.generate_v4() for random, uuid.generate_v5() for SHA-1 hash-based .
What is the difference between UUID and Sequential ID?
UUID is 128-bit and globally unique, Sequential ID is variable length and time-ordered. Sequential IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Sequential IDs are better for database indexing.
How do I generate a UUID in Nim?
Use the uuid library: import uuid; let uuid = genUUID(); let uuidString = $uuid . For specific versions: genUUID1() for time-based, genUUID4() for random, genUUID5() for SHA-1 hash-based .
What is the difference between UUID and Timestamp ID?
UUID is 128-bit and globally unique, Timestamp ID is variable length and time-ordered. Timestamp IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Timestamp IDs are better for chronological ordering.
How do I generate a UUID in Crystal?
Use the uuid library: require 'uuid'; uuid = UUID.random; uuidString = uuid.to_s . For specific versions: UUID.new for random, UUID.new_v1 for time-based, UUID.new_v4 for random, UUID.new_v5 for SHA-1 hash-based .
What is the difference between UUID and Monotonic ID?
UUID is 128-bit and globally unique, Monotonic ID is variable length and time-ordered. Monotonic IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Monotonic IDs are better for database performance.
How do I generate a UUID in V?
Use the uuid module: import uuid; uuid_string := uuid.new_v4() . For specific versions: uuid.new_v1() for time-based, uuid.new_v3() for MD5 hash-based, uuid.new_v4() for random, uuid.new_v5() for SHA-1 hash-based .
What is the difference between UUID and Incremental ID?
UUID is 128-bit and globally unique, Incremental ID is variable length and time-ordered. Incremental IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Incremental IDs are better for database indexing.
How do I generate a UUID in Zig?
Use the uuid library: const uuid = @import('uuid'); var uuid_bytes: [16]u8 = undefined; uuid.random(&uuid_bytes); const uuid_string = uuid.format(&uuid_bytes) . For specific versions, use functions like uuid.v1, uuid.v4, uuid.v5 .
What is the difference between UUID and Lexicographic ID?
UUID is 128-bit and globally unique, Lexicographic ID is variable length and time-ordered. Lexicographic IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Lexicographic IDs are better for string sorting.
How do I generate a UUID in Odin?
Use the uuid library: import 'core:crypto/rand'; import 'core:mem'; uuid_bytes: [16]u8; rand.bytes(uuid_bytes[:]); uuid_string := fmt.tprintf('%x-%x-%x-%x-%x', uuid_bytes[0:4], uuid_bytes[4:6], uuid_bytes[6:8], uuid_bytes[8:10], uuid_bytes[10:16]) .
What is the difference between UUID and Chronological ID?
UUID is 128-bit and globally unique, Chronological ID is variable length and time-ordered. Chronological IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Chronological IDs are better for time-based queries.
How do I generate a UUID in Carbon?
Use the uuid library: import uuid; let uuid = uuid::random(); let uuid_string = uuid.to_string() . For specific versions: uuid::v1() for time-based, uuid::v4() for random, uuid::v5() for SHA-1 hash-based .
What is the difference between UUID and Temporal ID?
UUID is 128-bit and globally unique, Temporal ID is variable length and time-ordered. Temporal IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Temporal IDs are better for time-series data.
How do I generate a UUID in Mojo?
Use the uuid library: from uuid import uuid4; uuid = uuid4(); uuid_string = str(uuid) . For specific versions: uuid1() for time-based, uuid3() for MD5 hash-based, uuid4() for random, uuid5() for SHA-1 hash-based .
What is the difference between UUID and Time-Ordered ID?
UUID is 128-bit and globally unique, Time-Ordered ID is variable length and time-ordered. Time-Ordered IDs are more compact and sortable, UUIDs are more widely supported and truly globally unique. Time-Ordered IDs are better for chronological operations.
How do I generate a UUID in Gleam?
Use the uuid library: import gleam/uuid; let uuid = uuid.random(); let uuid_string = uuid.to_string() . For specific versions: uuid.v1() for time-based, uuid.v4() for random, uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Sequential UUID?
UUID is 128-bit and globally unique, Sequential UUID is 128-bit and time-ordered. Sequential UUIDs are sortable and include timestamp information, regular UUIDs are random. Sequential UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Roc?
Use the uuid library: import uuid; uuid = uuid.random(); uuid_string = uuid.to_string() . For specific versions: uuid.v1() for time-based, uuid.v4() for random, uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Time-Sorted UUID?
UUID is 128-bit and globally unique, Time-Sorted UUID is 128-bit and time-ordered. Time-Sorted UUIDs are sortable and include timestamp information, regular UUIDs are random. Time-Sorted UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Haxe?
Use the uuid library: import uuid.Uuid; var uuid = Uuid.random(); var uuidString = uuid.toString() . For specific versions: Uuid.v1() for time-based, Uuid.v4() for random, Uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Time-Based UUID?
UUID is 128-bit and globally unique, Time-Based UUID is 128-bit and time-ordered. Time-Based UUIDs are sortable and include timestamp information, regular UUIDs are random. Time-Based UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Vala?
Use GLib.Uuid: using GLib; var uuid = Uuid.random(); var uuid_string = uuid.to_string() . For specific versions: Uuid.v1() for time-based, Uuid.v4() for random, Uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Sortable UUID?
UUID is 128-bit and globally unique, Sortable UUID is 128-bit and time-ordered. Sortable UUIDs are sortable and include timestamp information, regular UUIDs are random. Sortable UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Genie?
Use GLib.Uuid: uses GLib; var uuid = Uuid.random(); var uuid_string = uuid.to_string() . For specific versions: Uuid.v1() for time-based, Uuid.v4() for random, Uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Ordered UUID?
UUID is 128-bit and globally unique, Ordered UUID is 128-bit and time-ordered. Ordered UUIDs are sortable and include timestamp information, regular UUIDs are random. Ordered UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Chapel?
Use the uuid library: use uuid; var uuid = uuid.random(); var uuid_string = uuid: string . For specific versions: uuid.v1() for time-based, uuid.v4() for random, uuid.v5() for SHA-1 hash-based .
What is the difference between UUID and Chronological UUID?
UUID is 128-bit and globally unique, Chronological UUID is 128-bit and time-ordered. Chronological UUIDs are sortable and include timestamp information, regular UUIDs are random. Chronological UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in D?
Use the uuid library: import uuid; auto uuid = UUID.random(); auto uuidString = uuid.toString() . For specific versions: UUID.v1() for time-based, UUID.v4() for random, UUID.v5() for SHA-1 hash-based .
What is the difference between UUID and Temporal UUID?
UUID is 128-bit and globally unique, Temporal UUID is 128-bit and time-ordered. Temporal UUIDs are sortable and include timestamp information, regular UUIDs are random. Temporal UUIDs are better for database performance, regular UUIDs are more widely supported.
How do I generate a UUID in Nim?
Use the uuid library: import uuid; let uuid = genUUID(); let uuidString = $uuid . For specific versions: genUUID1() for time-based, genUUID4() for random, genUUID5() for SHA-1 hash-based .
What is the difference between UUID and Time-Ordered UUID?
UUID is 128-bit and globally unique, Time-Ordered UUID is 128-bit and time-ordered. Time-Ordered UUIDs are sortable and include timestamp information, regular UUIDs are random. Time-Ordered UUIDs are better for database performance, regular UUIDs are more widely supported.

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