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🆔 ULID Generator

Generate lexicographically sortable ULIDs locally for logs, records, queues, and test fixtures.

ULID generation checks

Reports timestamp/ISO time, unique count, and the timestamp-visibility caveat that makes ULIDs sortable but not opaque.

Runs in your browser

ULID generation runs locally. ULIDs include a timestamp prefix and are not secrets.

What this tool does

ULID Generator creates lexicographically sortable unique identifiers with timestamp and randomness components.

Why it is useful

It helps developers generate sortable IDs for logs, records, fixtures, URLs, and distributed systems experiments.

How it works

The browser combines a timestamp component with random data to produce ULID-style strings.

Best input

Choose whether you need current-time IDs, multiple IDs, or test fixtures.

Developer tip

For production records, generate IDs inside the trusted application environment and handle clock behavior carefully.

Privacy note

ULID generation happens locally in your browser.

Important limitation

ULIDs include a timestamp component and may reveal creation time. Collision risk depends on randomness and generation volume.

Quick answers

How are ULIDs different from UUIDs?

ULIDs are designed to sort roughly by creation time.

Are ULIDs secret?

No. Treat them as identifiers, not secrets.

Common Use Cases

Create sortable database IDs

Generate IDs that sort roughly by creation time for app records.

Generate traceable event IDs

Use timestamp-prefixed IDs for logs, jobs, events, and queues where order matters.

Avoid sequential integer IDs

Create public-friendly identifiers without exposing total record counts.

API examples

Call the same deterministic core through Utilito’s compact API router. Send only data you intentionally submit to the server-side endpoint.

Try in API playground →Schema →
Generate ULIDs with curl
curl
curl -X POST https://utilito.dev/api/run \
  -H "Content-Type: application/json" \
  -d '{"tool_id":"ulid-generator","input":{"count":5}}'
Generate ULIDs from JavaScript
javascript
const res = await fetch('https://utilito.dev/api/run', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    tool_id: 'ulid-generator',
    input: { count: 5 }
  })
});
const data = await res.json();
console.log(data.result.output || data.result.report);
Generate ULIDs from Python
python
import requests
payload = {
    "tool_id": "ulid-generator",
    "input": {"count": 5},
}
result = requests.post("https://utilito.dev/api/run", json=payload).json()["result"]
print(result.get("output") or result.get("report"))

Random ID & Token Toolkit workflow

Move between UUIDs, ULIDs, NanoIDs, passwords, hashes, random numbers, usernames, and placeholder names while keeping randomness, secret-handling, and collision caveats visible.

🆔UUID Generator🔡NanoID Generator🔑Password Generator🧮Hash Generator🎲Random Number / Sequence Generator👤Username Generator
View all in Hashing & IDs →