UUID Generator | A free, easy online tool

Options

How many

1 100

Uppercase

Remove dashes

Wrap in braces { }

Generated UUIDs

Random Number UUID Password Lorem Ipsum

How it Works

This tool generates Version 4 UUIDs (Universally Unique Identifiers) using your browser's built-in crypto.randomUUID() — the same secure source used for cryptographic keys. Every UUID has 122 bits of randomness, making collisions effectively impossible.

Options

Count: Generate from 1 to 100 UUIDs at once.
Uppercase: Output all hex characters in UPPERCASE (e.g. for SQL Server uniqueidentifier).
Remove dashes: Output as a 32-character string (xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx).
Wrap in braces: Output Microsoft GUID format ({xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}).

Common Use Cases

Database keys: Generate primary keys without round-tripping the database.
Test data: Seed unique IDs for fixtures, mocks, and integration tests.
API requests: Create idempotency keys or correlation IDs.
File names: Avoid collisions when bulk-uploading or generating documents.
Distributed systems: Mint identifiers without a central authority.

Privacy and Security

UUIDs are generated locally using your browser's secure random source. Nothing is sent to a server, logged, or cached.

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