UUID Generator
Generate cryptographically random UUIDs (v4) one at a time or in a batch of up to 100, with optional uppercase and no-dashes formatting.
About this tool
A UUID (Universally Unique Identifier) is a 128-bit value used to identify something — a database record, a file, a session — without needing a central authority to hand out sequential numbers. This tool generates version 4 UUIDs, meaning they're built from random bits rather than a timestamp or hardware address, using the Web Crypto API for cryptographically strong randomness. The odds of two generated UUIDs ever colliding are astronomically small.
Common uses: unique IDs for database rows (especially across distributed systems, where auto-incrementing IDs from different servers could collide), API keys and session tokens, naming uploaded files to avoid overwrites, and generating realistic-looking test data. Generate up to 100 at once, optionally in uppercase or without dashes, then copy individually or all at once.
Version 1.0.0