Free Online UUID Generator
A UUID generator produces RFC 4122 v4 UUIDs (128-bit random identifiers like `9c5b94b1-35ad-49bb-b118-8e8fc24abf80`) suitable for use as primary keys, request IDs, and globally unique identifiers.
Your data is processed entirely in your browser and never sent to any server.
How to Use This Developer Tool
- Click "Generate" for a single UUID, or set a count for bulk generation.
- The UUIDs appear in the output panel.
- Click "Copy" to copy a single UUID, or "Copy all" for the full list.
- Click "Generate" again for a fresh batch.
What Is an UUID Generator?
v4 UUIDs are generated from 122 bits of randomness, which gives ~5.3 × 10³⁶ unique values — enough that collisions are statistically negligible. They're used as database primary keys when you want to generate IDs client-side without coordinating with the server, as correlation IDs in distributed systems, and as opaque identifiers for files and tokens.
This generator uses the browser's `crypto.randomUUID()` (cryptographically secure on every modern browser) and lets you generate up to 1000 UUIDs at once. Each refresh produces fresh values; nothing is logged or transmitted.
Frequently Asked Questions
What UUID version is generated?
Can I generate multiple UUIDs?
UUID vs ULID?
References
Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.
Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.