Calculator
What the ULID Generator does
ULID Generator: generates Status, ULIDs and Timestamp from How many and Or decode a ULID (optional). Example: how many 5 and or decode a ULID (optional) (empty) gives timestamp 2026-09-06T12:00:00.000Z.
Enter How many and Or decode a ULID (optional) and the ULID Generator reports Status, ULIDs and Timestamp. Fill in the fields, run it, and the output shows up underneath.
Spotting a malformed field is far quicker when the structure is laid out clearly. The ULID Generator exists to take that particular chore off your hands.
The page holds your values in memory and forgets them the moment you close it.
The meaning of each field, the formula in use, and a worked example that starts from the default inputs are all further down.
What do the ULID Generator fields mean?
The ULID Generator uses 2 inputs. Every box starts with a working value, so there is a real result on screen before you touch anything.
| Field | What to enter | Default |
|---|---|---|
| How many | accepts 1 to 500 | 5 |
| Or decode a ULID (optional) | optional | none |
How does the ULID Generator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same generated output.
The guard clauses run before the formula does, which is why mistakes surface next to the field.
Worked example
These are the values the ULID Generator loads by default, and the result it produces from them. The figures are the tool’s live defaults and its live output, so you can reproduce them exactly.
| How many | 5 |
|---|---|
| Or decode a ULID (optional) | (empty) |
| Status | 5 ULIDs generated (same millisecond, random tail) |
|---|---|
| ULIDs | 01M1V9DXG0R4W5105ZH36XERY8 01M1V9DXG0DSGANNGB2D9KSVC4 01M1V9DXG0QN27FV41HN88MWJ7 01M1V9DXG08HCG5RA3T9JCYHQS… |
| Timestamp | 2026-09-06T12:00:00.000Z |
How to use it
- Enter How many (1 to 500).
- Set Or decode a ULID (optional).
- Press Generate.
- You get Status, ULIDs and Timestamp back.
- The link encodes your inputs, so saving it is enough to reproduce the result later.
What this tool does not do
- Output follows the common convention for this format; a specific toolchain may have its own house style.
- Processing happens in your browser, so very large inputs are bounded by available memory.
- It assumes the values you give are already consistent with each other.
- It validates ranges, not intent. A value can be accepted and still be the wrong one to use.
Frequently asked questions
How many and Or decode a ULID (optional). That is the whole form. Defaults are loaded for all of them, letting you treat it as a what-if tool rather than a data-entry form.
How many accepts 1 to 500. Out-of-range entries are refused up front, which is safer than silently clamping them.
With the values loaded when the page opens, status comes out as 5 ULIDs generated (same millisecond, random tail). That number tracks the inputs, so a small edit shows its sensitivity immediately.
Not at all: the whole thing runs offline once the page has loaded, which tells you nothing is being sent.
Free, and there is no upsell. The whole tool is the free version.
Reliable for the case described. Where more than one convention exists, the method section says which one is used.