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UUID Generator
Generate v4 UUIDs instantly for free. Unique, random identifiers for software projects, databases, and development.
How to use this tool
- Choose the UUID version and generation options.
- Generate one value or a batch, then review metadata in the table.
- Copy or export the resulting IDs in TXT, CSV, or JSON format.
Version guidance
- Use v4 for general random identifiers.
- Use v1 when time-ordering behavior matters.
- Use v5 for repeatable namespace-derived IDs.
Workflow tips
- Set retention limits high for long sessions and low for quick testing.
- Use deterministic v5 mode to recreate fixtures reliably.
- CSV export is useful for QA logs and spreadsheet checks.
FAQ
- Can I generate deterministic IDs?
- Yes. Select v5 and enable deterministic mode to derive IDs from seed + index + namespace.
- How many IDs can I generate at once?
- Batch size is configurable from 1 to 200 per run.
- Is there a fixed list cap?
- No. You can set the retained-row cap up to 500 in the controls.
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