Nano ID Generator

Generate short URL-safe Nano ID identifiers with configurable length, count, and alphabet.

For this tool, processing runs locally in your browser and data is not sent to the server.

Nano ID Generator is a free online tool that creates short URL-safe identifiers for slugs, invite codes, sessions, APIs, mock data, and client-side IDs. You can configure the count, length, alphabet, output format, prefix, and exclusion of visually similar characters. The tool uses a crypto-safe approach via the Web Crypto API and runs in your browser without sending data to the server.

What it does

Output

Processing

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How to use

Set the number of Nano IDs and the identifier length.
Choose an alphabet: URL-safe, lowercase, numbers, hex, or custom.
Optionally exclude visually similar characters, add a prefix, and choose an output format.
Click Generate and copy the Nano IDs for links, invite codes, sessions, APIs, mock data, or client-side IDs.

More about this tool

Nano ID Generator creates short URL-safe identifiers for links, slugs, invite codes, sessions, APIs, mock data, client-side IDs, and dev tasks. You can configure the number of IDs, length, alphabet, output format, prefix, and exclusion of visually similar characters.

Generation uses a crypto-safe approach through the Web Crypto API when available in the browser. The tool shows the alphabet size, approximate entropy, and warnings for IDs that are too short.

All generation is done locally in the browser. No data is sent to the server.

Runs in the browser
Data is not sent to the server
Generates short Nano IDs
Supports a URL-safe alphabet
Configurable length and count
Supports custom alphabets
Shows approximate entropy
Useful for links, invite codes, APIs, and mock data
No registration required

Frequently Asked Questions

What is Nano ID?

Nano ID is a short random identifier commonly used for links, slugs, invite codes, sessions, client-side IDs, and APIs.

How is Nano ID different from UUID?

UUID has a fixed standard format and is typically longer. Nano ID is shorter and lets you configure the length and alphabet, which is convenient for URLs and public IDs.

How is Nano ID different from ULID?

ULID contains a timestamp component and sorts chronologically. Nano ID is typically fully random and is not designed for time-based sorting.

What does URL-safe Nano ID mean?

A URL-safe ID consists of characters that can be used in links without additional encoding — Latin letters, digits, underscores, and hyphens.

Can I configure the Nano ID length?

Yes. You can set the length in the settings. The larger the length and alphabet, the lower the collision probability.

Can I use a custom alphabet?

Yes. Choose Custom and specify a character set. The alphabet must contain at least 2 unique characters.

Does Nano ID guarantee absolute uniqueness?

Nano ID has a low collision probability with sufficient length and a good alphabet, but absolute application-level uniqueness requires a uniqueness check such as a unique index in your database.

Can Nano ID be used as a secret token?

For security tokens, choose the length, alphabet, and crypto-safe generation carefully. For critical tokens, use a dedicated token generator and follow established security requirements.

Is my data sent to the server?

No. Nano IDs are generated locally in the browser and are not sent to the server.

Do I need to register?

No. The tool works immediately without registration.

How to use

Set the number of Nano IDs and the identifier length.

Choose an alphabet: URL-safe, lowercase, numbers, hex, or custom.

Optionally exclude visually similar characters, add a prefix, and choose an output format.

Click Generate and copy the Nano IDs for links, invite codes, sessions, APIs, mock data, or client-side IDs.

More about this tool

Generation uses a crypto-safe approach through the Web Crypto API when available in the browser. The tool shows the alphabet size, approximate entropy, and warnings for IDs that are too short.

All generation is done locally in the browser. No data is sent to the server.

Runs in the browser
Data is not sent to the server
Generates short Nano IDs
Supports a URL-safe alphabet
Configurable length and count
Supports custom alphabets
Shows approximate entropy
Useful for links, invite codes, APIs, and mock data
No registration required

Frequently Asked Questions

What is Nano ID?

Nano ID is a short random identifier commonly used for links, slugs, invite codes, sessions, client-side IDs, and APIs.

How is Nano ID different from UUID?

UUID has a fixed standard format and is typically longer. Nano ID is shorter and lets you configure the length and alphabet, which is convenient for URLs and public IDs.

How is Nano ID different from ULID?

ULID contains a timestamp component and sorts chronologically. Nano ID is typically fully random and is not designed for time-based sorting.

What does URL-safe Nano ID mean?

A URL-safe ID consists of characters that can be used in links without additional encoding — Latin letters, digits, underscores, and hyphens.

Can I configure the Nano ID length?

Yes. You can set the length in the settings. The larger the length and alphabet, the lower the collision probability.

Can I use a custom alphabet?

Yes. Choose Custom and specify a character set. The alphabet must contain at least 2 unique characters.

Does Nano ID guarantee absolute uniqueness?

Nano ID has a low collision probability with sufficient length and a good alphabet, but absolute application-level uniqueness requires a uniqueness check such as a unique index in your database.

Can Nano ID be used as a secret token?

For security tokens, choose the length, alphabet, and crypto-safe generation carefully. For critical tokens, use a dedicated token generator and follow established security requirements.

Is my data sent to the server?

No. Nano IDs are generated locally in the browser and are not sent to the server.

Do I need to register?

No. The tool works immediately without registration.