Nano ID Generator
Free Nano ID generator. Generate compact, URL-friendly unique IDs. Smaller and faster than UUID. All processing is local.
Click "Generate" to get started
How to Use Nano ID Generator
Configure Settings
Choose the ID length (8-36 characters) and how many IDs you need (1-50). You can also choose whether to use uppercase letters.
Generate IDs
Click "Generate" to create Nano IDs. Nano ID uses a larger alphabet than UUID (64 characters) making it more compact — a 21-character Nano ID has similar collision probability to a UUID.
Copy or Download
Use "Copy All" to copy the IDs, or "Download" to save them as a text file.
Example
V1StGXR8_Z5jdHi6B-myT21 characters, URL-safe, collision-resistant.
Frequently Asked Questions
What is Nano ID?
Nano ID is a tiny, secure, URL-friendly unique string ID generator. It's smaller than UUID (21 chars vs 36 chars for the same collision probability), faster to generate, and uses a more compact alphabet of 64 characters.
Nano ID vs UUID — which should I use?
Nano ID is smaller (21 chars vs 36), making it better for URLs and database keys where space matters. UUID is more widely recognized and has built-in support in most databases. Both are suitable for distributed systems. Choose Nano ID for compactness, UUID for compatibility.
How likely is a Nano ID collision?
With the default 21-character length and 64-character alphabet, you need to generate ~10^19 IDs for a 1% collision chance. For most applications, the collision risk is negligible.
About Nano ID
Nano ID uses a 64-character alphabet (A-Z, a-z, 0-9, _ and -) and cryptographically secure random number generation. The URL-safe alphabet means Nano IDs can be used directly in URLs without encoding. The default 21-character length provides ~126 bits of entropy — comparable to UUID v4.
Nano ID is an excellent choice for database primary keys, URL slugs, file names, and any scenario where you need compact unique identifiers.