UUID Implementation Guides
Production-ready UUID generation code for 25+ languages. CSPRNG-backed, zero network round-trips, copy-ready snippets.
UUID Implementation Guides
Production-ready code for 25+ languages. CSPRNG-backed, zero network round-trips.
What is Dev Lab?
Dev Lab is a curated library of production-ready UUID generation code for every major programming language and runtime. Each guide covers the recommended library, the correct entropy source (CSPRNG), version selection (v4 vs v7), and copy-ready snippets you can drop straight into your codebase.
While our online generators are great for quick use, high-throughput backend services need identifiers generated locally — no network round-trips, no rate limits, no single point of failure. Dev Lab gives you the blueprints to do exactly that.
Why Generate Locally?
No HTTP round-trip. IDs are generated in-process, in nanoseconds.
Identifier data never leaves your server. No third-party exposure.
Generate millions of IDs per second without API quotas or throttling.
All Languages
25 guides
Which UUID Version Should You Use?
The universal default. 122 bits of entropy, RFC 4122 standard. Use for user IDs, session tokens, API keys, and any general-purpose identifier.
The modern standard for database primary keys. Time-ordered, eliminates B-tree index fragmentation. RFC 9562. Use for any new relational database schema.
Time-ordered, URL-safe, 26 characters. Crockford Base32 encoding. Use for REST API resource IDs, event logs, and short URLs.
Compact, customizable alphabet. Use for short URLs, invite codes, slugs, and any context where a shorter ID is preferred.
Legacy timestamp + node ID format. Use only for Cassandra timeuuid or when migrating existing v1 systems.
Every guide in Dev Lab uses a Cryptographically Secure Pseudo-Random Number Generator (CSPRNG) — never Math.random(), rand(), or other non-cryptographic sources. Using a weak RNG for UUID generation defeats the uniqueness guarantee and can introduce security vulnerabilities in session tokens and API keys.