NanoID Generator
Generate NanoIDs online — tiny, secure, URL-friendly unique identifiers. Customize length (1-100 chars) and character set, generate up to 100 at once. Cryptographically secure, no signup, 100% client-side.
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What is NanoID Generator?
NanoID Generator creates small, secure, URL-friendly unique identifiers. A default NanoID is 21 characters of URL-safe alphabet (A-Za-z0-9_-) offering ~122 bits of entropy — comparable to UUID v4 but at roughly 60% of the length and without characters that break in URLs. You can customize the length (1-100) and pick from six preset alphabets for use cases that need a different character set.
Key Benefits
- Shorter than UUID (21 vs 36 chars) and URL-safe
- ~122 bits of entropy at default length — near-zero collisions
- Cryptographically secure random source (crypto.getRandomValues)
- Customizable length and alphabet for any use case
- Tiny footprint — ideal for client-side and embedded use
Common Use Cases
- •URL-safe primary keys and slugs
- •Session and CSRF tokens
- •Short-lived cache and shareable link IDs
- •Frontend component and element keys
- •Microservice request correlation IDs
How to Generate NanoID
- Set quantity and length: Enter how many IDs to generate (1-100) and the desired character length (1-100). The default length of 21 gives strong collision resistance.
- Choose an alphabet: Pick a character set: URL-safe (default), alphanumeric, numbers only, lowercase/uppercase hex, or no-lookalikes.
- Click generate: Press the "Generate" button. Your NanoIDs appear instantly using a cryptographically secure random source.
- Copy the IDs: Click an individual ID to copy it, or use "Copy All" to copy every generated ID to your clipboard.
Key Features
- Tiny, secure, URL-friendly unique IDs
- Custom length from 1 to 100 characters
- Six preset alphabets (URL-safe, alphanumeric, hex, no-lookalikes)
- Bulk generation up to 100 IDs at once
- Cryptographically secure (uses crypto.getRandomValues)
- 100% client-side, no data sent to any server