Generate ULID, NanoID, and KSUID values
Generate sortable or compact IDs locally for test data, fixtures, logs, and distributed systems without calling a server.
Open the tool, then paste the sample input below. Everything runs locally in your browser.
The problem
Different systems need different identifier shapes. UUIDs are common, ULIDs and KSUIDs sort by time, and NanoID is compact for user-facing or short-lived records.
Sample input
Need 5 sortable IDs for test orders created today.Expected output
01J0Q9Z7Y8N6P3W6Y2E1K8V5MD
01J0Q9Z7Y9S9VG5ZQ5Q8J8X2GPHow to do it
- Choose the ID type.
- Choose how many IDs to generate.
- Set length or alphabet options when relevant.
- Generate the IDs.
- Copy the list into fixtures or test data.
Common mistakes
- Using sortable IDs where random UUIDs are required by a system contract.
- Assuming every ID format is globally sortable.
- Changing NanoID length without considering collision risk.
- Using generated test IDs as production secrets.
Related tools
FAQ
When should I use ULID or KSUID?
Use them when lexicographic sorting by creation time is useful and your system accepts that ID format.
When is NanoID useful?
NanoID is useful when you need compact random IDs with configurable length and alphabet.
Are IDs generated locally?
Yes. ID generation runs in your browser.
Is my data uploaded anywhere?
No. This workflow runs locally in your browser unless you explicitly copy or share the result yourself.
This guide uses browser-local tooling. Avoid pasting production secrets unless you understand what the tool displays and shares.
Continue with adjacent browser-based tools for the same workflow.