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API Key & UUID Generator

Create UUID v1, v3, v4, v5, v6, v7, NIL/MAX constants, API keys, short IDs, and convert UUID bytes in seconds.

Generate IDs

Select a format, generate IDs, and copy them in seconds.

Best for general unique IDs. Fully random and hard to guess.

Generated IDs (0)

Click generate to create IDs.

About API Key & UUID Generator

Generate production-ready identifiers for apps, databases, and integrations. Choose between random UUIDs, time-ordered UUIDs, deterministic UUIDs, or readable API keys.

How to Use (Example + FAQs)

  • Example: Pick UUID v7, generate 5 IDs, and use them as sortable order IDs.
  • Step-by-step: (1) Select ID type. (2) Set quantity. (3) Generate and copy.
  • FAQ: Which type is best for databases? UUID v7 keeps time order for efficient indexing.
  • FAQ: How do I make deterministic IDs? Use UUID v5 with a fixed namespace + name.
  • FAQ: Are these safe for secrets? UUIDs are unique but not a replacement for cryptographic secrets.

UUID Types Explained

  • UUID v1: Time-based UUID with node identifier (legacy systems).
  • UUID v3: Deterministic IDs using MD5 over namespace + name.
  • UUID v4: Random UUIDs for general unique IDs.
  • UUID v5: Deterministic IDs using SHA-1 over namespace + name.
  • UUID v6: Reordered v1 designed for better database indexing.
  • UUID v7: Time-ordered UUIDs that keep inserts sorted.

Special UUID Options

  • NIL: All-zero UUID constant used as a placeholder value.
  • MAX: All-ones UUID constant useful for range comparisons.
  • Parse/Stringify: Convert UUIDs to byte arrays and back when working with binary storage.

Rebranding Ideas (Same ID, Different Context)

  • API Key: Use the UUID-based API key format with a prefix (example: twx_...).
  • Order ID: UUID v7 keeps records ordered while staying globally unique.
  • Document ID: UUID v4 works well as a random file or object ID.
  • User ID: UUID v4 or short IDs are easy to store and share.

Why Use This Tool?

  • ✓ Flexible Formats: Create UUIDs, API keys, or short IDs from one place.
  • ✓ Fast Copy: Generate multiple IDs and copy all in one click.
  • ✓ Database Friendly: Use UUID v7 when you need time-ordered keys.
  • ✓ Deterministic IDs: UUID v5 keeps names and IDs aligned.

Common Questions

  • Q: What’s the difference between v4 and v7?
    v4 is fully random; v7 is time-ordered to keep indexes efficient.
  • Q: When should I use v5?
    Use v5 when you need the same input to always map to the same ID.
  • Q: Are API keys generated here secure?
    They are unique but not a replacement for cryptographic secrets like HMAC keys.

Pro Tips & Best Practices

  • 💡 Prefix your API keys: Add a prefix to identify environment or product (dev_, prod_, twx_).
  • 💡 Prefer v7 for databases: It reduces index fragmentation versus random IDs.
  • 💡 Keep namespaces stable: For v5, changing namespace changes the output.
  • 💡 Store safely: Treat generated IDs like credentials when used as API keys.

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