Nano ID Generator
Generate compact URL-safe IDs locally with adjustable length and count.
Compact, URL-safe IDs
When a UUID feels too long, a Nano ID gives you a short, URL-safe, collision-resistant identifier — ideal for public-facing IDs in links and slugs. This generator produces Nano IDs locally with adjustable length and count.
Shorter IDs keep URLs tidy while staying practically unique at a reasonable length. Set the length and how many you need, and copy the batch — generated with secure randomness in your browser, so nothing is requested from a server.
Short, safe IDs, locally
A Nano ID packs collision resistance into a short, URL-safe string, which suits public-facing IDs. Generation runs in your browser and never uploads anything.
Frequently asked questions
How random are these IDs?
They use your browser's cryptographically secure random generator, drawing from a 64-character URL-safe alphabet.
What length should I use?
The default 21 characters gives a collision risk similar to a UUID. Shorter IDs are fine for small datasets.
Are Nano IDs safe in URLs?
Yes. The alphabet is letters, digits, underscore, and hyphen, so nothing needs encoding.
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