Short Id — Free Unique ID Generator API (No Key)

TL;DR

The Short Id API generates compact, unique, URL-safe identifiers on demand. Perfect for creating short IDs for URLs, database keys, order numbers, referral codes, and any use case requiring a collision-resistant identifier. Supports configurable ID length and character set. Returns JSON with the generated ID. No API key required.

Quick start: https://idgen.example.com/api/generate

No API key needed — free ID generation!

How to Use This API

1. Generate a Short ID

Returns a unique 8-character URL-safe ID:

https://idgen.example.com/api/generate

2. Specify ID Length

https://idgen.example.com/api/generate?length=12

3. Custom Character Set

https://idgen.example.com/api/generate?length=6&charset=alphanumeric

4. JavaScript — Batch ID Generation

async function generateMany(count) {
  const ids = [];
  for (let i = 0; i < count; i++) {
    const resp = await fetch('https://idgen.example.com/api/generate');
    const data = await resp.json();
    ids.push(data.id);
  }
  return ids;
}

generateMany(5).then(ids => {
  console.log('Generated IDs:', ids);
});

5. Python — Create IDs for Database

import requests

# Generate IDs for new records
new_users = ['Alice', 'Bob', 'Charlie']
for user in new_users:
    r = requests.get(
        'https://idgen.example.com/api/generate',
        params={'length': 10}
    ).json()
    print(f"User: {user}, ID: {r['id']}")

Generate an ID: https://idgen.example.com/api/generate

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Frequently Asked Questions

What characters are used in generated IDs?: Default IDs use URL-safe characters (A-Z, a-z, 0-9, plus underscore and hyphen). No ambiguous characters like 'l', '1', 'O', or '0' by default to avoid confusion.
How unique are the generated IDs?: IDs are generated using cryptographically random sources. With 8-character alphanumeric IDs, there are 62^8 (over 218 trillion) possible combinations — collision risk is negligible.
Can I specify the character set?: Yes — most ID generation APIs support parameters for charset (e.g., alpha, alphanumeric, numeric, hex) and length.
What's the typical use case for short IDs?: URL shortener codes, referral codes, order numbers, database primary keys, session tokens, shareable links, and any context where you want human-readable unique identifiers.
Is there a rate limit?: The API is free for reasonable usage. If you need high-volume ID generation (millions), consider using a client-side library like nanoid or uuid instead.
Are the IDs time-sorted or random?: IDs are randomly generated. They do not encode timestamps or sequential numbers. If you need time-sortable IDs, consider ULID or Snowflake-style ID generators.

API Details

API URL: https://idgen.example.com/api/generate
Documentation: github.com/aguedo/idgen
Category: Development
Authentication: Not Required
Parameters: length (int), charset (string)

What You Can Build

URL shortener generating compact, unique codes for each link
Order ID system for e-commerce with human-readable references
Referral code generator for user invite and marketing programs
Session token generator for lightweight authentication
Shareable link creator with user-friendly identifiers