Generate random UUIDs (v4) instantly. Free, private, runs in your browser.
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as a 36-character string (e.g., 550e8400-e29b-41d4-a716-446655440000). UUIDs are designed to be globally unique without requiring a central authority — the probability of generating a duplicate is astronomically small. They're widely used as primary keys in databases, API identifiers, and distributed systems.
Developers need UUIDs for database records, API resources, session tokens, file naming, and distributed system coordination. Generating UUIDs manually or sequentially creates collision risks and security concerns. A proper generator uses cryptographic randomness (v4) or time-based algorithms (v1) to ensure uniqueness across all systems globally.
Convertful generates version 4 (random) UUIDs using the Web Crypto API for cryptographically secure randomness. You can generate single or bulk UUIDs with one click and copy them instantly. Everything runs in your browser — no server call, no logging, no storage.
Yes. UUIDs are generated locally using your browser's built-in cryptographic random number generator. No generated values are transmitted or recorded anywhere.
Version 4 (random). Each UUID is 128 bits generated using the Web Crypto API for true randomness.
Yes. Specify how many you need and generate them all in one click.
Practically yes. The probability of a collision with v4 UUIDs is astronomically low — about 1 in 2^122.