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What is UUID Generator?
A browser-based UUID generator for creating v4 random UUIDs, v7 time-ordered UUIDs, and v1 timestamp UUIDs in bulk.
Key Features
- Generate UUID v4 values
- Generate UUID v7 time-ordered values
- Generate UUID v1 timestamp values
- Create up to 10,000 UUIDs at once
- Choose uppercase, braces, quotes, and comma formats
- Copy or download generated UUIDs
Common Use Cases
- Create database IDs
- Generate test fixtures
- Prepare API examples
- Create sortable UUID v7 identifiers
Example workflow
- Choose the UUID version and the number of IDs you need.
- Select formatting options such as uppercase, braces, or hyphenated output.
- Generate a small batch first and confirm it matches your database or API format.
- Copy or download the final batch for fixtures, migrations, or test data.
Safe use tips
- Treat UUIDs as identifiers, not as access control or authorization.
- Do not embed personal information or business meaning in public IDs.
- For public resources, pair identifiers with normal authentication and permission checks.
Frequently Asked Questions
What is a UUID?
A UUID is a 128-bit identifier designed to be unique across systems and datasets.
What is the difference between UUID v4 and v7?
UUID v4 is random. UUID v7 includes a timestamp, which makes it more suitable for sortable database indexes.
Is the UUID generator secure?
The generator uses browser cryptography APIs for random UUIDs and does not require a network request.
How many UUIDs can I generate at once?
The tool supports generating up to 10,000 UUIDs in one batch.