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Nano ID Generator

Generate compact, URL-safe Nano IDs in the browser. Choose alphabet presets, length, and bulk count. See entropy and collision odds — nothing is uploaded.

PrivateIn your browserInstantUnlimited

Default Nano ID length is 21 (~128 bits). No-lookalikes removes 0/O/1/l-style characters for easier reading.

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz-

Entropy

126 bits

Collision odds (this batch)

~0

0 IDs

How it works

1

Choose an alphabet

Use URL-safe (default), alphanumeric, hex, digits, or no-lookalikes — or paste your own custom alphabet.

2

Set length and count

Length controls strength (entropy). Generate up to 100 IDs at once and pick newline, comma, or JSON export.

3

Copy or download

Review entropy and collision odds, then copy the list or download a file. Everything stays in this tab.

What is Nano ID Generator?

Create compact unique IDs with Nano ID entirely in your browser. Tune alphabet and length, generate lists, and check entropy without uploading anything.

Why use this tool

  • URL-safe Nano IDs plus alphabet presets and custom alphabets
  • Bulk generation with newline, comma, or JSON export
  • Live entropy and birthday-paradox collision estimate
  • Runs locally — unlimited on the free plan

Questions

Nano ID vs UUID?

Nano IDs are shorter and URL-friendly by default. A 21-character URL-safe Nano ID has roughly the same collision resistance as a UUID v4.

What does entropy mean here?

Bits of unpredictability from length × log2(alphabet size). Higher is harder to guess or collide.

What are collision odds?

An approximate birthday-paradox chance that two IDs in this batch collide, given your alphabet and length. It is not a network-wide guarantee.

Is my data uploaded?

No. IDs are created with the Nano ID library in your browser.

Is there a daily limit?

No. This tool is unlimited on the free plan.

Do I need an account?

No. Open the tool and use it. An account is only for Pro later.

If Easy24 helped, buy a coffee

Tools stay free in your browser. One-time thanks via Kreosus. Turkish cards work.

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