Bulk UUID & ULID Generator
Generate cryptographically secure UUIDs (v1, v4, v5) or ULIDs. Generate a single ID instantly or bulk generate up to 10,000 IDs and download as CSV. Uses smart hybrid processing.
Bulk Generation Settings
UUID v4
Randomly generated. The most common standard for database primary keys.
ULID
Lexicographically sortable IDs. Great alternative to UUIDs when time-sorting matters.
UUID v5
Name-based UUID using SHA-1 hashing. Always returns the same UUID for the same name and namespace.
UUID v1
Time-based UUID. Contains MAC address of the generator. Use only when specifically required.
What is a UUID or ULID?
A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. UUIDs are widely used as primary keys in databases because their immense scale means they are effectively unique worldwide, requiring no central authority to coordinate generation.
A ULID (Universally Unique Lexicographically Sortable Identifier) is similar to a UUID but includes a timestamp at the beginning, making it alphabetically sortable by creation time. This solves a major performance issue when using UUIDs in databases like PostgreSQL or MySQL.
Features of this Generator
- Bulk generate up to 10,000 keys at once
- Export directly as CSV for immediate database seeding or API testing
- Hybrid processing: Small batches run instantly in browser; large batches offload to a high-concurrency backend server to prevent crashing
- Support for v1 (Time-based), v4 (Random), v5 (Name-based SHA-1), and ULID standards
- 100% Free with no usage limits