About The Nano ID Generator

Nano ID Generator creates compact random identifiers for URLs, database keys, public references, and client-side records. You can set the ID length, generate batches, and use a custom alphabet when your system has character restrictions.

Generation runs locally in your browser. The default alphabet is URL-friendly, but you should still validate collision risk and uniqueness rules in the application that stores these IDs.

How to Generate Nano IDs Online

1. Set the ID length and number of IDs to generate.
2. Keep the default alphabet or paste a custom alphabet.
3. Click Generate Nano IDs or load the sample settings.
4. Copy the newline-separated IDs into your project.

Choosing Options Correctly

ID length:
Longer IDs reduce collision risk. Use short IDs only when the space is small or uniqueness is enforced elsewhere.

Custom alphabet:
Use the default alphabet for URL-safe IDs. Customize it when you need lowercase-only, numeric-only, or system-specific characters.

Common Use Cases

• Creating short public IDs for share links.
• Generating compact test database keys.
• Preparing sample identifiers for API responses.

Quick FAQ

Can I use Nano IDs as passwords?
No. Nano IDs are usually identifiers. Use a password or token generator when the value controls access.

What happens if my alphabet has duplicate characters?
Duplicates reduce the effective alphabet size and can weaken uniqueness or randomness expectations.

What character sets can I use?
Use characters that are safe for your target system, such as URL-safe characters for links or database keys.

How should I choose length?
Longer IDs reduce collision risk. Choose length based on expected volume, alphabet size, and how costly a collision would be.