Quick Answer
A UUID generator creates universally unique identifiers — the 36-character strings (e.g. f47ac10b-58cc-4372-a567-0e02b2c3d479) used as database keys and object IDs. This tool generates v4 UUIDs from your device's cryptographic random source, in batches of up to 100.
What This Tool Does
Choose a quantity (1–100), optionally uppercase, and click Generate. Each UUID v4 uses crypto.getRandomValues — 122 bits of true entropy per ID — so collisions are effectively impossible at any realistic scale. There is no server involved.
Key Features
- Cryptographic randomness — the same source browsers use for security.
- Bulk generation — up to 100 at once, one per line.
- Uppercase option — match your project’s formatting.
- Copy all / download — paste the whole batch in one click.
How to Use the UUID Generator
- Pick a quantity from the dropdown.
- Toggle Uppercase if your schema requires it.
- Click Generate.
- Click Copy all to paste the list into your code or database.
Use Cases
- Seeding test data with unique primary keys.
- Generating IDs for API fixtures or import scripts.
- Creating shareable tokens where uniqueness matters.
Tips
- UUIDs are unique but not sequential — do not rely on them for ordering.
- Prefer UUID v4 over v1 for new systems; v1 encodes time and can leak metadata.
- Keep IDs lowercase unless a downstream system demands otherwise.
Privacy
UUIDs are generated locally with no network calls. Nothing is sent anywhere.
Conclusion
Need unique IDs now? Generate a batch, copy it, and get back to building. Free and private.