How UUIDs Are Generated
v4 UUIDs are generated from 122 bits of random data. The browser's crypto API provides cryptographically secure randomness, making client-side generation just as reliable as server-side — and more private.
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Compare UUID generation tools. Client-side vs server-side UUID generation — which is more reliable and private?
Best for: Generating UUIDs without any server dependency
Best for: One-off UUID generation when privacy doesn't matter
DevUtility uses the browser's crypto.randomUUID() for cryptographic randomness without any server call. UUIDGenerator.net generates UUIDs on their server — unnecessary and slower.
v4 UUIDs are generated from 122 bits of random data. The browser's crypto API provides cryptographically secure randomness, making client-side generation just as reliable as server-side — and more private.