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Free UUID Generator - Create Unique Identifiers Online
Generate UUID v1, v4, and v5 instantly for database records, API keys, and unique identifiers. Fast, standards-compliant, and completely free.
100% Free
Privacy Focused
Instant Results
Works Everywhere
UUID Generator
Generate UUID v1, v4, v5, v7, and Nil UUIDs. Bulk generate up to 500, choose formats (uppercase, no-hyphens, URN), and validate with version detection.
Accepts standard, no-hyphens, {braces}, and urn:uuid: formats. One per line.
About This Tool
What is UUID Generator?
Our UUID Generator creates universally unique identifiers (UUIDs) that are guaranteed to be unique across all systems and time. Whether you need database primary keys, session IDs, API tokens, or transaction identifiers, our tool generates standards-compliant UUIDs in milliseconds.
UUIDs (Universally Unique Identifiers), also known as GUIDs, are 128-bit numbers used to uniquely identify information in computer systems. Our generator supports UUID v1 (time-based), v4 (random), and v5 (namespace-based), giving you flexibility for different use cases.
The tool can generate single UUIDs or bulk generate thousands at once. Each UUID is cryptographically random and follows RFC 4122 standards. You can copy individual IDs, download as CSV/JSON, or use them directly in your code without any modifications.
All UUID generation happens locally in your browser using secure random number generators. No server requests, no data collection, complete privacy. Perfect for developers, database administrators, and system architects who need reliable unique identifiers.
Features
Powerful Features
Everything you need in one amazing tool
Multiple UUID Versions
Generate UUID v1 (timestamp), v4 (random), and v5 (namespace). Choose the right type for your needs.
Instant Generation
Create UUIDs in milliseconds. Bulk generate up to 10,000 UUIDs at once for large projects.
RFC 4122 Compliant
All generated UUIDs follow RFC 4122 standards. Compatible with databases and systems worldwide.
Bulk Generation
Generate thousands of UUIDs at once. Perfect for database seeding and testing scenarios.
Export Options
Download as CSV, JSON, or plain text. Copy individual UUIDs or entire batches instantly.
Cryptographically Random
Uses Web Crypto API for true randomness. No collisions, guaranteed uniqueness across systems.
Simple Process
How It Works
Get started in 4 easy steps
1
Select UUID Type
Choose UUID version: v1 (time-based), v4 (random), or v5 (namespace-based) depending on your use case.
2
Set Quantity
Enter how many UUIDs you need. Generate single UUID or bulk create thousands at once.
3
Generate IDs
Click generate button. Tool creates unique UUIDs instantly following RFC 4122 standards.
4
Copy or Export
Copy UUIDs to clipboard or download as CSV/JSON. Use immediately in your database or code.
Why Us
Why Choose Our UUID Generator?
Stand out from the competition
Universal Compatibility
Works with all databases: PostgreSQL, MySQL, MongoDB, SQL Server. Standard UUID format.
Guaranteed Uniqueness
Cryptographic randomness ensures no collisions. Safe to use across distributed systems.
Lightning Fast
Generate 10,000 UUIDs in under a second. No waiting, no delays, instant results.
Developer Friendly
Clean output formats. Copy-paste ready for SQL, JavaScript, Python, or any language.
100% Private
All generation happens locally. UUIDs never sent to servers. Complete privacy guaranteed.
Learn While Using
See UUID structure explained. Understand when to use v1, v4, or v5 for your project.
Use Cases
Perfect For
See how others are using this tool
Database Primary Keys
Use as primary keys in PostgreSQL, MySQL, MongoDB. Better than auto-increment for distributed systems.
API Development
Generate unique request IDs, session tokens, and API keys for tracking and authentication.
Order & Transaction IDs
Create unique identifiers for e-commerce orders, payment transactions, and invoice numbers.
Document Management
Generate unique document IDs for file systems, CMS platforms, and content management.
Testing & Seeding
Bulk generate UUIDs for database seeding, test data, and development environments.
Distributed Systems
Ensure uniqueness across microservices, cloud instances, and multi-region deployments.
Frequently Asked Questions
Everything you need to know about UUID Generator
A UUID (Universally Unique Identifier) is a 128-bit number that is globally unique. Unlike auto-incrementing IDs, UUIDs work perfectly in distributed systems where multiple databases need to generate IDs independently without conflicts. They're ideal for microservices, cloud applications, and systems that need to merge data from different sources.
UUID v1 includes timestamp and MAC address information, making it time-sortable but potentially less random. UUID v4 is completely random using cryptographic generators, offering better privacy since it contains no system information. V4 is recommended for most use cases unless you specifically need time-based ordering.
The probability of UUID collision is astronomically low - about 1 in 5.3 undecillion (5.3 × 10³⁶). In practical terms, you can generate billions of UUIDs without ever seeing a duplicate. They're safe to use across different systems, databases, and even organizations without coordination.
Yes, especially for distributed systems! UUIDs allow you to generate IDs client-side, merge databases easily, and avoid ID conflicts in multi-region setups. The trade-off is slightly larger storage (16 bytes vs 4-8 bytes for integers) and less human-readable, but the benefits far outweigh these minor disadvantages.
Most modern databases have native UUID support. PostgreSQL has UUID type, MySQL has BINARY(16) or CHAR(36), MongoDB uses ObjectId (similar concept). Simply use our generated UUIDs as primary keys or unique identifiers in your CREATE TABLE or INSERT statements.
Yes! For UUID v4, we use the Web Crypto API which provides cryptographically strong random values. This ensures true randomness and unpredictability, making them suitable for security-sensitive applications like session tokens and API keys.
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