NanoID Generator
Generate compact, URL-friendly NanoIDs instantly using JavaScript. Perfect for identifiers in web apps, short URLs, and distributed systems.
NanoID Generator
Powered byJavaScript & the Web Crypto API
All NanoIDs are generated locally using cryptographically secure randomness; nothing is sent to a server.
Select a number and click Generate to create NanoIDs.
What is a NanoID?
NanoID is a tiny, URL-safe unique ID generator. It produces compact random strings (default length 21) using cryptographically secure randomness.
Configurable length
Choose the output length (default 21) to balance size and collision resistance.
URL-safe alphabet
NanoIDs use a URL-safe alphabet (_-0-9A-Za-z), so they work in web URLs and filenames.
Secure randomness
Generated locally using Web Crypto API; nothing is sent to a server.
What is a NanoID?
NanoID is a tiny, URL-friendly unique ID generator. It produces compact random strings using cryptographically secure randomness.
The default NanoID length is 21 characters, but you can customize the length to fit your use case.
- Default length is 21 characters (configurable)
- Uses a URL-safe alphabet:
_-0-9A-Za-z - Generated client-side with Web Crypto API
- Compact and safe for use in URLs, filenames, and databases
NanoID Structure
This tool generates NanoIDs using secure randomness from the browser's Web Crypto API.
Other UUID Tools
NanoIDs are a complement to UUIDs; the WebEasier suite supports both.
| Tool | Use Case | Format | Typical Size |
|---|---|---|---|
| UUID v4 | General unique IDs | 8-4-4-4-12 hex | 36 chars |
| NanoID | Time-sortable IDs | 27-char base62 | 27 chars |
Example NanoIDs
Click an example to generate a NanoID quickly.
Frequently Asked Questions
Answers to common questions about NanoID generation.
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