UUID / ULID / NanoID / KSUID Generator

The ID Generator batch-produces cryptographically-secure unique identifiers in the modern formats developers actually use: UUID v4 (fully random 128-bit), UUID v7 (time-ordered, index-friendly), ULID (26-character Crockford base32, lexicographically sortable), NanoID (compact URL-safe ID with configurable length), and KSUID (27-character sortable format popularized by Segment). Every ID is generated locally via `crypto.getRandomValues()` — no data leaves your browser and there's no rate limit.

Format choice matters. UUID v4 is the safe universal default and every language has native support. UUID v7 is the same 128-bit shape but starts with a millisecond timestamp, which massively improves B-Tree index locality in PostgreSQL / MySQL and eliminates the fragmentation problem v4 causes at scale. ULID and KSUID are both sortable and URL-friendlier than UUID's hex form; ULID is the shorter of the two. NanoID trades UUID compatibility for a much smaller footprint — 21 characters gives you similar collision resistance to UUID v4 in most application-scale key spaces.

Use this tool when seeding a database, generating API keys or invitation codes, building fixtures for tests, replacing sequential IDs before publishing an SDK, or benchmarking key size against your storage layer. Copy one ID at a time or export up to 500 in a single click.