UUIDs (Universally Unique Identifiers) are 128-bit identifiers designed to be unique across all systems without requiring a central authority. When you create a database record, a session token, a transaction ID, or an API correlation key, UUIDs ensure there is virtually zero chance of collision — even across distributed systems that never communicate. The Utility Spark UUID Generator creates RFC 4122 compliant Version 4 UUIDs using your browser's built-in cryptographic random number generator (crypto.getRandomValues). The UUIDs are generated locally — no server is involved, which means no generated UUID is ever logged, stored, or transmitted. This matters when generating identifiers for security-sensitive systems.
lightbulb When to use this tool
- check_circle Generate primary keys for database records (PostgreSQL, MongoDB, DynamoDB)
- check_circle Create unique session or transaction identifiers for APIs
- check_circle Generate correlation IDs for distributed system tracing and debugging
- check_circle Create unique file names to prevent overwrites in storage systems (S3, GCS)
- check_circle Generate temporary tokens for email verification or password reset links
- check_circle Test systems that require UUID-format input values
Why use our tool?
Cryptographically Random (v4)
Uses crypto.getRandomValues() — the same cryptographic RNG used for SSL/TLS. This ensures UUIDs are truly random and unpredictable, unlike Math.random()-based generators that produce patterns detectable in large datasets.
RFC 4122 Compliant
Every generated UUID follows the RFC 4122 standard format: 8-4-4-4-12 hex characters with the correct version (4) and variant bits. These UUIDs are accepted by PostgreSQL's uuid type, Java's UUID class, C#'s Guid, and every other standards-compliant UUID parser.
Bulk Generation
Generate multiple UUIDs at once — useful when seeding databases, creating test fixtures, or preparing batch import files. Each UUID is generated independently using the cryptographic RNG.
Zero Server Involvement
All generation happens in your browser's JavaScript engine. No API call, no logging, no storage. You can verify this by disconnecting from the internet — the generator continues working.
One-Click Copy
Copy a single UUID or all generated UUIDs to clipboard instantly. The output format includes one UUID per line for easy pasting into SQL INSERT statements, JSON arrays, or configuration files.
How it works
Set the quantity of UUIDs to generate (default: 1, max: 100).
Select the output format: standard hyphenated (RFC 4122) or compact no-hyphen.
Click 'Generate UUID(s)' — the output appears immediately.
Click 'Copy' next to any individual UUID, or 'Copy All' to copy the entire batch.
Click 'Generate' again to produce a fresh set — each generation produces entirely new, independent identifiers.
Examples
science Single UUID for Database Record
Use case: Generate a primary key before inserting a new user record
Output: 7b5e8e40-2a3d-4f6b-9c1d-8e7f3a2b0c5d
SQL usage: INSERT INTO users (id, email) VALUES ('7b5e8e40-2a3d-4f6b-9c1d-8e7f3a2b0c5d', 'user@example.com')
science Bulk UUID Generation for Test Fixtures
Quantity: 10
Use case: Seeding a test database with 10 unique order IDs
Output: 10 UUIDs, one per line, copy-paste into your test fixture JSON or SQL seed file