Free online uuidgen tool — no signup, instant results in your browser.https://uuidgen.io/enhttps://uuidgen.io/blog/what-is-a-uuid/https://uuidgen.io/blog/what-is-a-uuid/Learn what a UUID is: the 128-bit format, hyphen structure, version numbers, and why UUIDs are practically collision-free. Covers UUID v1, v4, v5, and v7.Sat, 25 Apr 2026 00:00:00 GMThttps://uuidgen.io/blog/uuid-v4-vs-v7/https://uuidgen.io/blog/uuid-v4-vs-v7/Compare UUID v4 (random) vs UUID v7 (time-ordered). Learn when each is appropriate, how v7 improves database index performance, and migration strategies.Sat, 25 Apr 2026 00:00:00 GMThttps://uuidgen.io/blog/uuid-in-database/https://uuidgen.io/blog/uuid-in-database/Learn how to use UUIDs as database primary keys in PostgreSQL, MySQL, and SQLite. Covers storage types, index performance, UUID v7 benefits, and UUID vs autoincrement.Sat, 25 Apr 2026 00:00:00 GMThttps://uuidgen.io/blog/uuid-vs-guid/https://uuidgen.io/blog/uuid-vs-guid/Understand the difference between UUID and GUID: RFC 4122, Microsoft's GUID format, generation methods, case sensitivity, and when to use each term.Sat, 25 Apr 2026 00:00:00 GMThttps://uuidgen.io/blog/generate-uuid/https://uuidgen.io/blog/generate-uuid/Generate UUIDs online and in code. Covers Python uuid module, JavaScript crypto.randomUUID, Node.js uuid package, CLI uuidgen, SQL gen_random_uuid, and UUID v7.Sat, 25 Apr 2026 00:00:00 GMThttps://uuidgen.io/blog/how-to-generate-uuid-code/https://uuidgen.io/blog/how-to-generate-uuid-code/Generate UUID v4 and v7 in Python (uuid module), JavaScript (crypto.randomUUID), Go (google/uuid), Java, C#, PHP, Rust, and SQL with working code examples.Sat, 25 Apr 2026 00:00:00 GMT