Nano ID Generator
Generate compact random IDs with customizable size and alphabet.
Nano ID Generator
Runs entirely in your browser
This tool executes locally using standard browser APIs (for example window.crypto.getRandomValues or crypto.subtle where applicable). Your input is not transmitted to or stored on a ScriptPulse server. See How Calculations Work.
What This Tool Does
- The Nano ID Generator is a browser-first developer utility designed to generate compact, random identifiers locally. In database design and web development, unique keys are required to index records and reference elements. Standard UUIDs are 36 characters long, which can bloat database indexes and URL parameters. Nano ID is a tiny, secure, URL-friendly unique string generator that uses a 64-character alphabet, offering custom sizes and symbols configurations.
- The generator operates entirely client-side. The random index generations and string compilations are computed in browser memory using the Web Crypto API's CSPRNG. No data is sent over the network, keeping your system keys and database parameters secure.
How It Works
- The tool reads the target string length and alphabet parameters from the input configurations.
- It calculates random indexes using browser-native `crypto.getRandomValues()`.
- The engine maps the random index integers to the selected alphabet characters.
- It compiles the characters into a unique random string.
- The generated Nano IDs are rendered in the result panel, with copy buttons enabled.
Usage
- Configure the ID length (default is 21 characters).
- Select or customize the alphabet character set (alphanumeric, symbols).
- Click the 'Generate IDs' button to start the local CSPRNG calculations.
- Review the generated list in the results panel.
- Copy the IDs to your clipboard for database or application integration.
Examples
- Generating a default 21-character Nano ID: Outputting a URL-safe random string.
- Creating short 10-character IDs: Generating compact codes for lookup tables.
- Customizing alphabet lists: Excluding characters to avoid confusion.
- Generating batches of 10 IDs: Building parameters for staging environment tests.
Real-World Use Cases
- Generating compact primary keys for database tables to optimize indexing speeds.
- Creating URL-safe identifiers for public resource pages and elements.
- Building short unique transaction codes for ecommerce setups.
- Generating random tracking parameters for local debugging.
- Creating compact identifiers for temporary file folders.
Best Practices
- Use the default length of 21 characters for general database identifiers.
- Exclude similar-looking characters (like 0, O, I, l) in custom alphabets to prevent entry errors.
- Use hardware-backed cryptographic random generators for all client-side key generation.
- Store identifiers in binary configurations where possible to optimize database storage.
Common Mistakes
- Using Math.random() for key generation: standard random functions are predictable and insecure.
- Reducing string length too much (e.g. less than 10 characters), which increases collision risks.
- Assuming Nano IDs are sortable: standard Nano IDs are randomly generated and have no order.
- Storing generated IDs in unsecure files instead of environment variables.
Limitations
- IDs are generated in transient state; reloading the page clears the workspace.
- This utility does not manage ID allocations or collision check databases.
- Calculations are client-side only; reloading the page clears the generated list.
Technical Reference Guide
- CSPRNG Standards: Uses browser Web Crypto APIs for cryptographically secure random values.
- Alphabet Specs: Standard alphabet uses URL-safe symbols (letters, numbers, underscores, hyphens).
- Collision Probability: Similar to UUID v4, a 21-character Nano ID has negligible collision risk.
FAQ
Is my Nano ID generation secure?
Yes. All IDs are generated locally inside your browser memory using the Web Crypto API. No data is sent to external servers.
How is Nano ID different from UUID?
Nano ID is shorter (21 characters vs 36), uses a larger alphabet (64 characters), and is customizable, making it more compact and URL-friendly.
How random are the generated IDs?
The generator uses `crypto.getRandomValues()`, which leverages hardware-based entropy sources for cryptographic randomness.
What is the probability of a Nano ID collision?
For a default 21-character Nano ID, you would need to generate 100 million IDs per second for 149 years to have a 1% chance of a collision.
Can I save generated IDs on ScriptPulse?
No. The site does not store any of your generated list values. Copy them immediately before reloading the page.
Can I customize the alphabet?
Yes. You can input custom character sets (e.g. numeric only) to suit your database requirements.
Are Nano IDs case-sensitive?
Yes. The standard alphabet contains both uppercase and lowercase letters, meaning 'a' and 'A' are distinct characters.
Can I use Nano IDs in URLs?
Yes. The standard alphabet uses only URL-safe characters (A-Z, a-z, 0-9, _, -), making it safe to pass in URL paths and parameters.
Does the generator work offline?
Yes. Once the page is loaded, the page assets are cached, allowing you to use all tools without an active internet connection.
Why is Nano ID faster than UUID?
Nano ID uses simpler string operations and formatting rules, making it faster to compile than UUIDs.
How many bits of entropy are in a Nano ID?
A default 21-character Nano ID contains 126 bits of entropy, which is secure.
Is Nano ID sortable by creation time?
No. Nano ID is randomly generated and has no chronological order. If you need time-sortable keys, use ULIDs.
Part of this Developer Hub
This utility is part of our comprehensive Authentication & Tokens Lab topic workspace.
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