Nano ID / ULID Generator
About Nano ID Generator
The NanoID Generator creates tiny, secure, URL-friendly unique string IDs (e.g. `V1StGXR8_Z5jdHi6B-myT`) with customizable lengths (8 to 64 chars) and custom alphabet character sets using hardware-backed Web Crypto entropy.
How to Use Nano ID Generator
Step 1
Select desired ID length (default: 21 characters).
Step 2
Choose an alphabet preset or enter your custom character set.
Step 3
Inspect generated NanoID tokens and estimated collision resistance metrics.
Step 4
Click "Copy NanoIDs".
Practical Use Cases for Nano ID Generator
Short URL & Link Shortener Identifiers
Generate compact 6 to 10 character URL slugs for link shorteners (e.g. `renderxd.com/s/7xK9pQ`) that are collision-resistant.
Compact Database Primary Keys
Use 21-character NanoIDs as lightweight, readable primary keys in MongoDB, Prisma, and PostgreSQL.
Input & Output Examples
Generating Standard 21-Character NanoID
Length: 21, Alphabet: URL-Safe (A-Z, a-z, 0-9, _, -)
V1StGXR8_Z5jdHi6B-myT (Collision probability: ~1% in 1,000 years with 1M IDs/sec)
Key Features & Performance
- ✓Presets: Standard URL-Safe (64 chars), Numbers Only, Hexadecimal, Alphanumeric (Base62), and Custom Alphabet.
- ✓Configurable ID length (4 to 64 characters) with live collision probability calculations.
- ✓Batch generation of up to 1,000 NanoIDs simultaneously.
- ✓100% Client-Side generation using `crypto.getRandomValues()`.
- ✓1-Click Copy and 1-Click `.txt` export.
Key Terminology & Definitions
NanoID
A tiny, secure, URL-friendly unique string ID generator created by Andrey Sitnik as a more compact alternative to UUIDv4.
Collision Probability
The statistical likelihood of generating two identical random IDs based on alphabet size, ID length, and generation volume.