UUIDs aren’t the only option for unique identifiers — nanoid and cuid-style IDs are shorter, URL-safe, and popular defaults in modern JavaScript frameworks and ORMs. This tool generates both styles in bulk.
What Is the Nanoid & CUID Generator?
The Nanoid & CUID Generator creates cryptographically random, URL-safe unique IDs in either nanoid’s default alphabet or a CUID2-style lowercase alphanumeric format that always starts with a letter.
How to Use It
- Open the tool at /tools/nanoid-cuid-generator.
- Choose a format (Nanoid or CUID2-style).
- Set the length and how many IDs to generate.
- Click “Generate” and copy the batch with one click.
Key Features
- Cryptographically secure randomness via the Web Crypto API, not
Math.random(). - Configurable length and batch size, up to 100 IDs at once.
- URL-safe by default — no escaping needed when used in URLs, filenames, or query strings.
- Fully client-side — IDs are generated locally and never transmitted anywhere.
When to Use This Tool
- Generating test data or seed IDs for a database or fixture file.
- Prototyping before wiring up the real
nanoidorcuid2npm package. - Quick one-off unique identifiers for temporary keys, filenames, or session tokens.
Try It Now
Open Nanoid & CUID Generator directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Security & Validators collection on WebdevToolbox — free, browser-based developer tools with no login required.