UUID Generator

Workflow & Usage

1. Set the count. Choose how many UUIDs you want to generate (from 1 up to hundreds).

2. Pick your format.

   • Uppercase for capital hex characters.
   • No hyphens for compact 32-character output.

3. Generate instantly. UUIDs are generated live and displayed one per line.

4. Copy with one click. Use the Copy button to copy all generated UUIDs at once.

The badges below the output show the number of UUIDs, total characters, and UUID version so you can verify results instantly.

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Use Cases

• Database Primary Keys Generate globally unique IDs without coordinating sequences or risking collisions.

• APIs & Microservices Assign request IDs, resource identifiers, or correlation IDs across distributed systems.

• Frontend Development Create stable keys for UI components, lists, or client-side data stores.

• Testing & QA Quickly generate large sets of unique identifiers for test fixtures and mock data.

• Logs & Tracing Use UUIDs to track events, errors, and requests across systems.

• Offline & Privacy-Sensitive Work Generate IDs without relying on servers, SDKs, or third-party services.

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Tips for Best Results

• UUID v4 is the default choice. Unless you have a specific reason, v4 is the safest and simplest option.

• Hyphens are optional. Keep them for readability; remove them if you need compact identifiers.

• Uppercase vs lowercase doesn’t matter. UUID comparison is case-insensitive — choose what matches your codebase style.

• Generate in batches for imports. One UUID per line makes it easy to paste into spreadsheets, SQL scripts, or seed files.

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How It Works

All UUIDs are generated directly in your browser:

• Cryptographically secure randomness. Uses crypto.randomUUID() when available, or a standards-compliant fallback based on crypto.getRandomValues.

• RFC 4122 compliant. The version and variant bits are set correctly for UUID v4.

• Batch generation. Multiple UUIDs are generated independently — no shared state, no counters.