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.

Length (21)

How many

List format

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz-

Entropy

126 bits

Collision odds (this batch)

Generated list0 IDs

How it works

Choose an alphabet

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

Set length and count

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

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. Nano ID Generator is part of Easy24’s generator toolbox. Your input stays in this tab for normal use; Easy24 does not upload that content to process it. This tool has no daily free-plan cap; use it as often as you need. Typical flow: Pick an alphabet preset (or custom), set length and how many IDs, generate, then copy or download as lines, commas, or JSON. Entropy and collision odds update with your settings. Related tools and reverse conversions appear on the page when a follow-up step is common.

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 with unlimited use on the free plan
Collision probability estimate for your alphabet and length

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.

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When to use Nano ID Generator

Nano ID Generator is one of those utilities you open for a few minutes, finish the task, and close without leaving a trail of uploads. Generate compact, URL-safe Nano IDs in the browser. Treat generated secrets as sensitive even when created locally; store them in your password manager, not in chat logs. Because Nano ID Generator is bilingual on Easy24, the same workflow works in English or Turkish without changing how the tool behaves. Browser-first processing is the privacy default here: there is no Easy24 document inbox waiting to expire after a timeout for this workflow. This page has no daily free-plan cap, so you can run it as often as you need. When you are done, download or copy what you need, then close the tab. Related tools on the page cover common follow-up steps such as the reverse conversion or a neighboring format.

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