Free Online UUID Generator
The UUID generator produces RFC 4122 version 4 identifiers — 128-bit random values used for database primary keys, request IDs, and idempotency tokens.
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.
- Read the UUIDs in the output panel.
- Click a row's Copy button for one value, or Copy All for the batch.
- Click Generate again for a fresh set.
What Is an UUID Generator?
Version 4 UUIDs draw 122 bits of randomness, giving roughly 5.3 × 10³⁶ unique values — enough that collisions are statistically negligible. They're the default choice for primary keys that need to be generated client-side without coordinating with the server, for correlation IDs across distributed systems, and for opaque identifiers on files, sessions, and tokens.
This generator uses the browser's `crypto.randomUUID`, which is cryptographically secure on every modern browser. Batch mode produces up to 1000 fresh UUIDs at once for seeding test data, populating a database fixture, or pre-generating IDs for a migration.
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.