How many UUIDs can I generate at once?

You can generate up to 1,000 UUIDs in a single batch. All generation happens in your browser using crypto.getRandomValues().

Should I use UUID v4 or v7?

Use v4 for general-purpose random IDs. Use v7 for database primary keys or when time-ordering matters — v7 includes a millisecond timestamp prefix for sortable uniqueness.

UUID Generator - v4, v7 Random UUID

All processing happens locally in your browser — nothing is sent to any server

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Version

Quantity1

1100

Format

Uppercase

What is a UUID?

UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely label information in computer systems. Think of it as a digital fingerprint for data — each UUID is unique and generated without a central authority.

UUID Structure: A UUID is written as 32 hexadecimal digits separated by hyphens into 5 groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. The version variant is encoded in specific bit positions.

Version Comparison

Common Use Cases

🗄 Database primary keys🌐 Distributed system IDs🌏 Session or resource identifiers📨 Message queue message IDs🧪 Test data and mocking

UUID Generator is a free online tool for generating v1, v3, v4, v5, and v7 UUIDs in bulk. Conforms to RFC 4122/9562. Runs entirely in your browser.

What is the UUID Generator?

UUID (Universally Unique Identifier) is a 128-bit identifier standard defined in RFC 4122 and RFC 9562. This tool generates UUID v4 (random) and v7 (time-ordered) in bulk. Use generated IDs as Password seeds, encode them in QR codes, or verify uniqueness with Hashing.

UUIDs are widely used as database primary keys, distributed system identifiers, and session tokens. With 2^122 possible values, collision probability is negligible.

What is a UUID?

Common Use Cases

What is the UUID Generator?

Frequently Asked Questions

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