Modern Unique ID Generator

Modern Unique ID Generator | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Generator
Input types: select, number, text
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The Modern Unique ID Generator allows developers to instantly generate secure, collision-resistant, and sortable identifiers including ULID, NanoID, Snowflake, and CUID2. You can customize ID lengths, configure distributed machine parameters for Snowflake IDs, or decode existing ULID strings to extract their embedded timestamps.

When to use

When designing database schemas that require URL-friendly, secure, or chronologically sortable primary keys.
When configuring distributed systems that need Snowflake IDs with specific worker and datacenter configurations.
When debugging or auditing data by extracting creation timestamps directly from existing ULID strings.

How it works

1Select your preferred identifier format from ULID, NanoID, Snowflake, or CUID2.
2Adjust generation parameters such as the total count, custom length, or Snowflake-specific worker and datacenter IDs.
3Click generate to output the list of unique identifiers, or paste a ULID into the decode field to extract its creation timestamp.

Use cases

Generating secure, non-sequential API keys or public tokens using NanoID or CUID2.
Creating chronologically sortable database keys using ULID to optimize index performance.
Simulating distributed ID generation for microservices using custom Snowflake worker configurations.

Examples

1. Generating Sortable Database Keys

Backend Engineer

Background

A backend engineer is setting up a new database table for user activity logs and needs primary keys that sort naturally by time without exposing auto-incrementing integers.

Problem

Generate a batch of 100 chronologically sortable, collision-resistant identifiers.

How to use

Select 'ULID' as the ID format, set the count to 100, and click generate.

Format: ULID, Count: 100

Outcome

A list of 100 lexicographically sortable ULIDs ready to be inserted as primary keys.

2. Extracting Creation Time from a ULID

Database Administrator

Background

An administrator is auditing a suspicious log entry and needs to know exactly when the associated record was created based on its ULID.

Problem

Extract the timestamp from the ULID 01ARZ3NDEKTSV4RRFFQ69G5FAV.

How to use

Paste 01ARZ3NDEKTSV4RRFFQ69G5FAV into the 'Decode ULID' input field.

Decode ULID: 01ARZ3NDEKTSV4RRFFQ69G5FAV

FAQ

What is the difference between ULID and CUID2?

ULID is lexicographically sortable and contains a timestamp, making it ideal for database indexing, while CUID2 is designed for security, collision resistance, and unpredictability in horizontal scaling.

How do I decode a ULID timestamp?

Paste the ULID string into the decode input field, and the tool will extract and display the exact millisecond timestamp encoded within it.

Can I customize the length of all ID formats?

No, length customization is only supported for NanoID and CUID2. ULID and Snowflake have fixed-length specifications.

What parameters are required for Snowflake IDs?

You can configure the Worker ID (0-1023), Datacenter ID (0-31), and a custom epoch timestamp in milliseconds.

How many unique IDs can I generate at once?

You can generate up to 500 unique identifiers in a single batch.

3. Generating Custom Length NanoIDs for URL Shortening

Full-Stack Developer

Background

A developer is building a URL shortener and needs short, secure, and unpredictable strings to append to the redirect domain.

Problem

Generate 10 secure identifiers with a custom length of 12 characters.

How to use

Select 'NanoID' as the ID format, set the count to 10, and set the length to 12.

Format: NanoID, Count: 10, Length: 12

Outcome

Ten unique 12-character NanoID strings suitable for short URLs.

Modern Unique ID Generator

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Generating Sortable Database Keys

2. Extracting Creation Time from a ULID

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3. Generating Custom Length NanoIDs for URL Shortening