How to use UUID Generator
- Choose a quantity from 1 to 100.
- Select Generate UUIDs. Use Regenerate whenever you want a completely new batch.
- Copy one UUID beside its row, copy the complete result, or download the list.
A closer look
A version 4 UUID is a 128-bit identifier whose random portion is generated with cryptographically secure browser randomness. Its usual spelling has five hexadecimal groups separated by hyphens, such as xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. The version and variant bits are set correctly, and the remaining 122 bits provide a very large random space. The tool uses crypto.randomUUID when available, with a getRandomValues fallback. It never substitutes Math.random if secure randomness is unavailable.
A practical example
Generate a batch of ten UUIDs for synthetic test records. Copy one identifier or download the batch; UUID generation does not create records in a database.
A useful tip
UUIDs are useful for records, test fixtures, and filenames. Their collision probability is extremely low, but this tool does not check a global registry or guarantee that a value has never existed elsewhere.
Good questions. Simple answers.
Which UUID versions are supported?
This tool generates random UUID v4 only. It does not create time-based, namespace-based, or sortable UUID versions.
Will regenerating preserve my previous batch?
No. The displayed batch is replaced. Copy or download any identifiers you need before regenerating or resetting.
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