UUID Generator
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Generate UUIDs for apps, tests, and databases.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
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What is a UUID generator?
A UUID generator creates random unique identifiers (v4) for databases, APIs, and test data. IDs are generated locally in your browser.
This random UUID generator produces standard UUID strings on demand. Use them as document IDs, session tokens in dev environments, or placeholder keys in API mocks—all generated locally without signup.
Do not use predictable or truncated UUIDs for security secrets—UUIDs identify records; they are not auth tokens by themselves.
Some databases prefer hyphenless UUID strings—strip hyphens if your ORM requires it.
How to use this tool
Generate UUIDs, copy individually or in bulk, and paste into code, SQL, or JSON fixtures.
Worked example
Example: paste five generated UUIDs into a Jest fixture file for order IDs in checkout flow tests.
When to use this
- Mock API servers returning resource IDs.
- Populating spreadsheet imports with unique keys.
- Quick unique filenames in automation scripts.
Common examples
- Generate v4 UUID for a new database primary key in local seed scripts.
- Batch of five UUIDs for mock API fixtures in integration tests.
- UUID for trace id in log correlation examples in documentation.
- Ten UUID v4 values → seed rows for local integration test database.
- UUID v7 batch → ordered IDs for event-sourcing demo data.
What people search for
- uuid generator
- generate uuid v4
- random uuid online
- guid generator
- unique id generator
Common mistakes
- Reusing the same UUID across environments.
- Using UUID where auto-increment integers suffice.
- Committing generated secrets tied to UUID patterns.
Related long-tail tasks
- bulk uuid generator copy all
- uuid without hyphens format
- guid generator windows style
How it works
Choose UUID version 4 (random) or version 7 (time-ordered), how many to generate, and formatting options. UUIDs are created on your device with secure random generation and are not stored or sent to a server.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data stays on your device and is not uploaded.
Related UUID Generator guides
These pages use the same uuid generator with guides tailored to specific search intents.
FAQ
Frequently asked questions
UUID vs GUID?
GUID is Microsoft's term for the same 128-bit identifier format.
Bulk generation?
Generate multiple IDs on the tool page when bulk mode is available.
Offline use?
Generation runs in the browser once the page is loaded.
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