What this tool is good for
ULID stands for Universally Unique Lexicographically Sortable Identifier. It combines a timestamp prefix with randomness so generated IDs can be sorted in roughly chronological order.
That makes ULID useful in some business workflows as a UUID alternative, especially when readable sorting or time ordering matters.
The format follows the canonical ULID specification: a timestamp component plus randomness encoded with Crockford's Base32 alphabet.
How to use it
- Choose how many ULIDs you want to generate.
- Enable JSON array output if you want to paste the result directly into test fixtures or code.
- Refresh to generate a new batch, then copy the result.
Format notes
A ULID is a 26-character string. It includes 10 timestamp characters and 16 random characters, so it stays sortable while still being unique enough for normal application workloads.
FAQ
What is a ULID used for?
A ULID is a unique identifier that includes a timestamp component and a random component. It is useful for database records, logs, queues, and URLs where sortable IDs are helpful.
How is a ULID different from a UUID?
A ULID is lexicographically sortable by creation time and usually easier to read because it uses Crockford Base32. A UUID is more widely standardized and may be the better choice for strict compatibility.
Are ULIDs safe to use as passwords or secrets?
No. ULIDs are identifiers, not credentials. Use a random password generator or cryptographic token generator when you need a secret value that must resist guessing.
Related tools
- UUID Generator：Generate UUID and GUID values, including UUID v1 and v4
- Random Password Generator：Generate random passwords, tokens, and strings