How to use NanoID / ULID Generator
Paste your input on the left, choose the options you want, and the output appears instantly on the right. Everything runs in your browser — none of your data is sent to a server.
- Paste or type your input in the
INPUTpanel - The output regenerates automatically as you type
- Use
Copyto put the result in your clipboard - Click
Sampleto load a working example
What is NanoID / ULID Generator?
NanoID / ULID Generator creates IDs better suited for modern apps than UUID v4. **NanoID** is 21 chars by default (≈149 bits entropy — collision-equivalent to UUID v4), URL-safe (A-Z, a-z, 0-9, _, -), and configurable length 2–256. **ULID** is 26 chars Crockford base32, lexicographically sortable by creation time (first 48 bits = ms timestamp, last 80 bits = randomness), monotonic mode prevents same-ms collisions and preserves order in tight loops. Decode mode shows each ULID alongside its embedded ISO timestamp. Bulk mode generates up to 1,000 IDs per click. Custom alphabet for NanoID lets you generate Crockford-friendly, digit-only PINs, or any custom charset. This tool is part of santekno's developer toolbox — a curated collection of utilities built for engineers who care about speed, privacy, and simplicity.
Common use cases
- Debugging API payloads and integration issues
- Inspecting tokens, hashes, or encoded strings during development
- Generating fixtures and sample data for tests
- Sharing readable output with teammates in code reviews