What is UUID?
UUID (Universally Unique Identifier) is a 128-bit globally unique ID, commonly used for database primary keys and distributed system identifiers. v4 is based on random numbers, while v7 is timestamp-based, better suited for time-ordered scenarios.
Generate UUID with HeronTool
- Open the UUID v7 Generator page on HeronTool.
- Choose version: select v4 for random IDs, v7 for time-ordered needs.
- Click the "Generate" button to get a single UUID instantly.
- For bulk generation, set the quantity (up to 1000) and copy results with one click.
Usage Recommendations
- v4: Suitable for security tokens and records without ordering requirements.
- v7: Suitable for logs and message queues; time ordering improves index performance.
FAQ
Q: Which is more secure, v4 or v7? Both are equally secure; v4 is fully random, v7 contains a timestamp but is unpredictable.
Q: Can I use it offline? Yes, HeronTool generates locally in your browser; no data is uploaded.
Q: Will generated UUIDs duplicate? The probability is extremely low and negligible.
