NanoID Generator
Generate unique, secure, URL-friendly NanoIDs. Smaller and faster than UUIDs.
Default: 21 characters (recommended)
Generate up to 100 IDs at once
Default: A-Za-z0-9_-
Collision Probability:
- Generate secure, URL-friendly IDs
- Customizable length (8-64 characters)
- Bulk generation (up to 100 IDs)
- Custom alphabet support
- Collision probability calculation
- 21 characters provide 1000 years of generating 1000 IDs/hour
- Set your desired ID length (default 21 is recommended)
- Choose how many IDs to generate
- Optionally provide a custom alphabet
- Click "Generate NanoIDs"
- Click individual copy buttons or "Copy All" for batch operations
NanoID is a smaller, faster, and more URL-friendly alternative to UUID. It's 21 characters by default (vs 36 for UUID), uses a URL-safe alphabet, and is 60% faster to generate while maintaining the same level of uniqueness.
Yes! A 21-character NanoID provides enough entropy for generating 1000 IDs per hour for 1000 years before reaching a 1% probability of collision. For comparison, UUID v4 has a similar collision probability.
Yes! You can provide your own alphabet. However, be aware that smaller alphabets increase collision probability. The default alphabet (A-Za-z0-9_-) with 64 characters provides optimal entropy.