UUID Generator
Generate random UUID v4 identifiers.
Universally Unique Identifiers give database rows, API resources, and distributed systems a collision-resistant ID without a central allocator. Utilitoo's UUID Generator creates RFC 4122 version 4 UUIDs using cryptographically secure random values directly in your browser.
Use generated UUIDs as primary keys in PostgreSQL or MongoDB, as correlation IDs in microservice logs, as temporary filenames, or as client-side IDs before syncing to a server. Each click produces a fresh random UUID ready to copy into your schema migrations or OpenAPI examples.
Generate one ID at a time or batch several for test fixtures. Pair with our Token Generator when you need opaque secrets rather than standard UUID format, or with Hash Generator when you need deterministic fingerprints from input text.
Utilitoo never stores generated UUIDs or sends them anywhere. Generation is instant, free, and runs entirely client-side. Ideal for backend developers, QA engineers, and anyone prototyping APIs or data models without a local CLI installed. When seeding local databases or writing integration tests, having one-click UUIDs avoids hard-coded IDs that accidentally collide across branches or developer machines. The generator is also useful when writing OpenAPI examples, database seed scripts, and mock API responses that need realistic unique identifiers. As part of Utilitoo's free, privacy-first toolkit, this page requires no sign-up and keeps your work on your device.
Use UUID Generator when you need a private, fast pass on uuid generator data. Generate random UUID v4 identifiers. Validate surprising output on a staging sample before it influences production changes.
Common use cases
- Generate random UUID v4 identifiers - especially when the source arrives as a single unreadable line.
- Validating uuid generator shapes from webhooks, feature flags, or infrastructure manifests.
- Cleaning uuid generator snippets before they land in README files or internal wikis.
- Cross-checking CI failure logs that include uuid generator fragments.
- Using UUID Generator as a quick second opinion next to a local CLI when results look suspicious.
Tips & common mistakes
UUID Generator avoids context-switching to a desktop utility for one-off uuid generator work. Keep secrets out of shared screen recordings even though processing is local. Cross-check surprising results with a CLI once, then trust the browser tool for repeated edits.
How to use
- Choose how many UUIDs to generate.
- Click Generate.
- Copy individual or all UUIDs.
Frequently Asked Questions
How do I generate a UUID v4 online?▼
Open Utilitoo's UUID Generator and click Generate. A new random UUID appears instantly, ready to copy into your project.
Are UUIDs generated by this tool truly unique?▼
UUID v4 uses 122 bits of randomness, making collisions astronomically unlikely for practical applications.
What is the difference between UUID and GUID?▼
GUID is Microsoft's name for the same concept. UUID v4 from Utilitoo follows the open RFC 4122 standard used across platforms.
Can I use these UUIDs as database primary keys?▼
Yes. UUID v4 is widely supported in PostgreSQL, MySQL, MongoDB, and most ORMs as a standard primary key type.
Is UUID generation safe to use for production systems?▼
Yes. Utilitoo uses secure randomness in your browser. IDs are not logged, stored, or transmitted to any server.