UUID Generator – Create UUID/GUID Identifiers for Developers
UUID generator creates universally unique identifiers (UUID v4) for database rows, API calls, and other development needs. Generate one or multiple UUIDs at once.
The tool supports UUID v1 (timestamp-based) and v4 (random) versions. You can copy UUIDs in different formats: standard format, without hyphens, uppercase letters. Generate up to 100 UUIDs at once.
What is UUID and What is it Used For?
UUID (Universally Unique Identifier) is a 128-bit identifier in format `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`. UUID v4 is random — collision probability between two identical UUIDs is so small (1/2^122) that practically all are unique. Used for database rows, session identifiers, filenames, and anything requiring unique identification without centralized counter.
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Browse all tools →The UUID generator creates unique identifiers (UUID/GUID) for software development needs. Essential tool for developers requiring unique identification codes.
Generate random UUID identifiers (v4) with one click – copy directly for use.
- Generate UUID v4 identifiers randomly.
- Create multiple UUIDs at once as needed.
- Copy identifier to clipboard with one click.
UUID is a 128-bit identifier with virtually zero probability of repetition.
- UUID v4 is randomly generated – each is unique without centralized registry.
- Format: 8-4-4-4-12 hexadecimal characters (e.g., 550e8400-e29b-41d4-a716-446655440000).
- UUIDs are used as database keys, session codes, and other identifier needs.
UUID is an identifier, not an encryption key – don't use for security-critical purposes.
- Guessing a UUID is extremely unlikely, but it's not cryptographically secure.
- Generation happens entirely in browser – identifiers aren't stored on server.
- Different UUID versions (v1, v3, v4, v5) suit different use cases.