Free UUID Generator Online (v4)

Generate secure RFC4122 UUID v4 identifiers instantly using browser cryptographic randomness. Supports bulk UUID generation and local processing without uploading data.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify objects, records, sessions and resources across distributed systems.

UUIDs are designed to minimize collisions even when generated independently across multiple systems.

What is UUID v4?

UUID version 4 uses cryptographically secure random values to generate identifiers. This makes UUID v4 suitable for databases, APIs, distributed systems and unique object tracking.

RFC4122 Compliance

This tool generates RFC4122-compliant UUID v4 identifiers using the browser Web Crypto API.

Browser-Based Privacy

All UUID generation happens locally in your browser. No generated identifiers are uploaded or stored on servers.

Common UUID Use Cases

• Database primary keys
• API request identifiers
• Session and authentication tokens
• Distributed system identifiers
• Object and file tracking

Bulk UUID Generation

Generate up to 100 UUIDs at once and copy or download them instantly for development workflows.

Related Tools

Random String Generator, Password Generator, Timestamp Converter, Hash Generator

Frequently Asked Questions

What is a UUID?

A UUID is a universally unique identifier used for records, sessions and distributed systems.

What is UUID v4?

UUID v4 uses cryptographically secure random values to generate identifiers.

Does this tool upload generated UUIDs?

No. All UUID generation happens locally in your browser.

Are these UUIDs RFC4122 compliant?

Yes. This tool generates RFC4122-compliant UUID v4 identifiers.