UUID v7 Generator – Modern, Time-Ordered UUIDs for Developers

UUID v7 is the future-facing UUID standard designed for performance, ordering, and scalability. This guide explores how to use a UUID v7 Generator effectively, why developers should migrate to v7, and how tools like LangsTop UUID Generator v7 streamline instant and bulk UUID creation.

👉 Try it live: https://langstop.com/uuid-generator/v7

What Is UUID v7?

UUID v7 is a time-based UUID that combines:

• Unix timestamp (milliseconds)
• High-quality randomness

Unlike UUID v4, UUID v7 is sortable by time, making it ideal for:

• Databases
• Distributed systems
• Event logs
• Scalable APIs

UUID v7 was introduced to solve real-world performance issues caused by fully random UUIDs.

Why UUID v7 Is Better Than UUID v4

UUID v7 dramatically improves B-tree index locality in PostgreSQL, MySQL, and distributed databases.

UUID v7 Generator – Instant & Bulk Generation

The UUID v7 Generator at LangsTop provides:

• ⚡ Instant UUID v7 generation
• 📦 Bulk UUID v7 generation
• 🧪 Spec-compliant output
• 🧠 Developer-focused UI

Use it when you need clean, sortable, production-ready UUIDs without writing boilerplate code.

🔗 https://langstop.com/uuid-generator/v7

Single UUID v7 Generation (Example)

Use a single UUID when:

• Creating a record
• Generating request IDs
• Assigning entity identifiers

Example Output

018f2c77-8c9b-7c91-9baf-0c91c98cde71

This UUID embeds a timestamp while maintaining randomness for safety.

Bulk UUID v7 Generator for High-Scale Systems

Bulk UUID v7 generation is useful for:

• Batch inserts
• Data migrations
• Pre-seeding databases
• Offline ID generation

The LangsTop UUID v7 tool allows you to generate hundreds of UUIDs instantly, with copy-ready output.

How to Generate UUID v7 in JavaScript (Complete Code)

/**
 * UUID v7 generator (RFC draft compliant)
 */
export function uuidv7(): string {
  const now = Date.now();
 
  const timeHex = now.toString(16).padStart(12, "0");
  const rand = crypto.getRandomValues(new Uint8Array(10));
 
  rand[0] = (rand[0] & 0x0f) | 0x70; // version 7
  rand[2] = (rand[2] & 0x3f) | 0x80; // variant
 
  const hex = [...rand].map(b => b.toString(16).padStart(2, "0")).join("");
 
  return (
    timeHex.slice(0, 8) + "-" +
    timeHex.slice(8, 12) + "-" +
    hex.slice(0, 4) + "-" +
    hex.slice(4, 8) + "-" +
    hex.slice(8, 20)
  );
}

✔ Safe for browsers
✔ Works in Node.js
✔ Suitable for Next.js API routes

UUID v7 in Next.js Applications

UUID v7 is perfect for modern stacks like:

• Next.js
• Tailwind CSS
• ShadCN UI
• Zustand state management

Example Use Case

const id = uuidv7();
 
setItems(prev => [...prev, { id, name: "New Item" }]);

This ensures ordered state updates and predictable rendering behavior.

Database Performance Benefits of UUID v7

UUID v7 improves:

• Insert speed
• Index fragmentation
• Query performance

Recommended usage:

• PostgreSQL uuid columns
• Primary keys
• Event sourcing systems

UUID v7 keeps inserts append-heavy, reducing index churn.

UUID v7 vs ULID

UUID v7 is the standardized successor to ULID.

When Should You Use UUID v7?

Use UUID v7 if:

• You care about DB performance
• You need globally unique IDs
• You want time-based ordering
• You build distributed systems

Avoid UUID v4 for write-heavy systems.

FAQs – UUID v7 Generator

What is UUID v7 used for?

UUID v7 is used for scalable, time-ordered identifiers in modern systems.

Is UUID v7 safe?

Yes. It combines timestamps with cryptographic randomness.

Can I use UUID v7 in PostgreSQL?

Yes. PostgreSQL supports UUID v7 natively as a UUID type.

Is UUID v7 better than auto-increment IDs?

Yes, especially in distributed and microservice architectures.

Can I generate UUID v7 in bulk?

Yes. Use the bulk generator at https://langstop.com/uuid-generator/v7

Final Thoughts

UUID v7 is the best choice for modern developer systems.
For instant and bulk UUID v7 generation, use:

👉 https://langstop.com/uuid-generator/v7