Generate globally unique identifiers (UUID v4) for databases, sessions, and distributed systems — instant and bulk-friendly.
Generate version-4 UUIDs (Universally Unique Identifiers) — also called GUIDs (Globally Unique Identifiers) in Microsoft ecosystems — for use as database primary keys, session tokens, distributed system identifiers, and anywhere else you need a guaranteed-unique value.
A UUID is a 128-bit value typically displayed as 32 hexadecimal characters in five groups separated by hyphens (8-4-4-4-12), e.g. f47ac10b-58cc-4372-a567-0e02b2c3d479.
The total UUID space is 2^128 ≈ 3.4 × 10^38 values. If you generated 1 billion UUIDs per second for 100 years, the probability of even one collision would be vanishingly small. UUIDs are safe to generate independently across distributed systems without coordination.
Bulk generation — generate 1 to 1000 UUIDs at once.
Format options — with or without hyphens, uppercase or lowercase, with or without surrounding braces.
Copy all / download — copy to clipboard or download as .txt / .csv.
Cryptographically random — uses the Web Crypto API for true v4 randomness.
Database primary keys (no need to coordinate auto-increment across shards).
Distributed system tracing IDs.
Session and request IDs.
API idempotency keys.
File and asset identifiers in object storage.
Component IDs in COM and .NET programming.
For new databases, consider UUID v7 (timestamp-ordered) instead of v4 — it keeps B-tree indexes efficient because new IDs sort to the end. Never expose internal UUIDs in public URLs unless you don't mind making them guessable; use opaque slugs for user-facing resources.
How to Use UUID / GUID Generator
Enter or paste the content you want to process using the uuid / guid generator.
Adjust any available settings or options to customize the output.
View, copy, or download your processed results instantly.
Generate globally unique identifiers (UUID v4) for databases, sessions, and distributed systems — instant and bulk-friendly.
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