Nano ID Generator
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Generate secure, unique, and URL-friendly identifiers for database IDs, API keys, and more.
Configure options and click "Generate Nano IDs"
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When you need to generate unique identifiers for database records, short links, or API keys, Nano ID is a more compact and efficient alternative to UUID. Nano ID is a URL-safe, random string generation algorithm that uses a 64-character alphabet (A-Za-z0-9_-) and a cryptographically secure random generator by default. A standard 21-character ID provides approximately 2.18×10³⁸ possible combinations.
Can Nano IDs have collisions?
With a 21-character length, generating 1 billion IDs per second would take about 30,000 years for a collision to occur.
How is the randomness of the ID guaranteed?
It uses the browser's built-in Web Crypto API to obtain cryptographically secure random numbers, which is significantly safer than using Math.random().
It is not recommended to use the generated IDs directly for extremely high-security scenarios like password storage. For ultra-large-scale systems, we recommend adding an extra uniqueness validation step.
Typical use cases: We recommend a 16-character length for user session IDs (e.g., Xq3F_9kLpYb2mN7R) and 8-10 characters for short links (e.g., aB3dFg7H). If you need a specific character set, you can enter it in the custom alphabet area (requires at least 16 distinct characters).
