ID Generator

What is ID Generator?

ID Generator produces unique identifiers in multiple formats including CUID2 (collision-resistant, URL-safe), NanoID (small, configurable alphabet), ULID (time-ordered, Crockford Base32), MongoDB ObjectID (12-byte, timestamp-embedded), Snowflake (Twitter-style, 64-bit integer), and KSUID (K-Sortable, 20-byte). Each format is explained with its properties — sortability, size, entropy, and use cases.

Database architects selecting primary key strategies, distributed systems engineers generating coordination-free IDs, and backend developers choosing between identifier formats. The tool runs entirely in your browser — your data never leaves your device.

How to Use ID Generator

1. Select the identifier type from the format tabs — CUID2, NanoID, ULID, ObjectID, Snowflake, or KSUID
2. Configure format-specific options like length, alphabet, or machine ID
3. Generate single identifiers or bulk batches for testing and seeding
4. Review the format properties panel showing size, encoding, and ordering characteristics
5. Copy generated IDs individually or as a batch for use in your application

Common Use Cases

• Choosing between identifier formats based on sortability, size, and collision resistance requirements
• Generating ULID identifiers for time-ordered database records without auto-increment
• Producing NanoID strings with custom alphabets for URL-safe short identifiers
• Creating Snowflake IDs for distributed systems that need monotonically increasing integers
• Generating KSUIDs for log entries that benefit from chronological sorting by ID

Pro Tips

• Use ULID or KSUID if you need IDs that sort chronologically without a separate timestamp column — their time component is embedded in the ID itself and comes first for natural ordering
• NanoID with the default 21-character length has collision probability comparable to UUID v4 but in 40 percent fewer characters — it is a drop-in replacement in most string ID use cases
• Snowflake IDs fit in a 64-bit integer and include a timestamp, machine ID, and sequence — they are ideal when your database primary key must be a bigint and you need distributed generation

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: CUID2, NanoID, ULID, Snowflake ID.

Frequently Asked Questions