UUID & ID Generator
Represents elegance, inner strength, and the intricate complexity of unique patterns.
Generate UUIDs, ULIDs, and NanoIDs in bulk. Perfect for databases, APIs, and distributed systems.
Example:
550e8400-e29b-41d4-a716-4466554400000 IDs generatedUUIDV4
Understanding ID Types
UUID v4 (Random)
The most widely used UUID format. Uses 122 random bits, making collisions virtually impossible. Best for unpredictable, secure identifiers.
UUID v7 (Time-Ordered) 🔥 New
The new standard for database primary keys. Embeds a timestamp for natural sorting, improving database performance by 30-60% compared to v4.
ULID (Sortable)
26-character lexicographically sortable identifier. Encodes timestamp in a URL-safe format. Popular in distributed systems and event logging.
NanoID (Compact)
21-character URL-safe ID. Smaller than UUID but equally collision-resistant. Perfect for URLs, session tokens, and web applications.
When to Use Which?
| Use Case | Recommended |
|---|---|
| Database Primary Keys | UUID v7 |
| Security Tokens / Session IDs | UUID v4 |
| Event Logging / Analytics | ULID |
| URL Shorteners / User-Facing IDs | NanoID |
| Distributed Systems | UUID v7 or ULID |
Frequently Asked Questions
What is the difference between UUID v4 and v7?â–¼
UUID v4 is purely random, while UUID v7 includes a timestamp prefix. V7 is better for database indexes because it's naturally sorted by time, improving write performance by 30-60%.
Why should I use ULID instead of UUID?â–¼
ULIDs are shorter (26 chars vs 36), lexicographically sortable, and more URL-friendly. They're popular for systems that need time-ordered IDs without the complexity of UUID v7.
Is NanoID secure?â–¼
Yes. NanoID uses crypto.getRandomValues() which is cryptographically secure. With 21 characters from a 64-char alphabet, it has ~126 bits of entropy, similar to UUID v4.
Do you store my generated IDs?â–¼
No. All ID generation happens locally in your browser using JavaScript. We never see, store, or transmit the IDs you generate.
What export formats are available?â–¼
You can export as TXT (one per line), JSON array, CSV with headers, or SQL INSERT statements ready to paste into your database.