Nano ID Generator

What is a Nano ID?

A Nano ID is a compact, secure, URL-friendly unique string identifier. It is designed as a smaller alternative to UUIDs while maintaining strong randomness and very low collision probability.

How this Nano ID generator works

This tool generates Nano IDs using the browser’s cryptographically secure random number generator (Web Crypto API). Each ID is created by randomly selecting characters from a generated character pool based on your selected options.

You can control the output by adjusting length, enabling character sets (a-z, A-Z, 0-9, symbols), and optionally adding extra characters to the pool. This gives you both structured presets and full flexibility when needed.

Character set system

The generator builds a final character pool using your selected options. By default, you can combine lowercase letters, uppercase letters, numbers, and safe symbols. You can also extend this pool with custom extra characters.

If no base character sets are selected, only the extra characters will be used. If both are empty, generation is blocked to avoid invalid output.

Why use Nano IDs?

Nano IDs provide strong uniqueness with significantly shorter length than UUIDs. They are ideal for modern applications where compact, fast, and URL-friendly identifiers are needed.

• Smaller size — shorter than nanoIds while still highly unique.
• Flexible charset — combine character groups or add custom characters.
• URL-friendly — supports safe characters for web usage.
• Fast generation — uses browser-native cryptographic randomness.

Why use this Nano ID generator?

• Generate Nano IDs instantly
• Generate multiple IDs at once
• Customize length and character composition
• Add prefixes and suffixes
• Export in multiple formats (JSON, comma-separated, newline)

Common use cases

• Database identifiers
• API keys and tokens
• Invite and referral codes
• Frontend element IDs
• URL-safe short identifiers
• Distributed systems and event IDs