UUID & ID Generator
Generate UUIDs, ULIDs, and NanoIDs in bulk. Free, no signup required — runs entirely in your browser.
caf0bd68-53db-4f0f-94fe-550b2551b547Frequently Asked Questions
What is a UUID?▼
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUID v4 uses random numbers, while UUID v7 combines a timestamp with random data for time-ordered sorting.
What is the difference between UUID v4 and UUID v7?▼
UUID v4 is entirely random, making it ideal when ordering doesn't matter. UUID v7 embeds a millisecond-precision timestamp, so IDs naturally sort by creation time — great for database primary keys.
What is a ULID?▼
ULID (Universally Unique Lexicographically Sortable Identifier) is a 26-character, Crockford Base32-encoded ID. Like UUID v7, it's time-ordered, but it's shorter, case-insensitive, and URL-safe.
What is a NanoID?▼
NanoID is a compact, URL-friendly unique ID generator. It produces 21-character IDs using A-Za-z0-9_- characters. It's smaller than UUID while maintaining strong collision resistance.
Are these IDs generated securely?▼
Yes. All IDs are generated using the Web Crypto API (crypto.getRandomValues), which provides cryptographically strong random numbers. Everything runs in your browser — no data is sent to any server.
