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Developer Tool

UUID v4 Generator Online

Generate random UUID v4 identifiers instantly in your browser.

UUIDs are generated locally using secure browser cryptography.

How to use?

1

Generate UUID v4

Click to generate a random UUID version 4 instantly.

2

Copy UUID

Copy the generated UUID v4 with one click.

3

Use Anywhere

Use the UUID v4 in databases, APIs, or applications.

Use cases

Use cases

How this tool can help you in real-world scenarios

🧑‍💻 Database Primary Keys

UUID v4 is widely used as a primary key to uniquely identify records without relying on auto-increment IDs.

🌐 Distributed Systems

Random UUID v4 values avoid collisions across microservices and distributed environments.

📦 API Resource Identification

Assign UUID v4 identifiers to API resources, requests, and transactions.

🧪 Testing & Mock Data

Generate realistic random UUID v4 values for testing, fixtures, and mock data.

🔐 Public Identifiers

UUID v4 helps prevent predictable or sequential IDs in URLs and public-facing systems.

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Frequently Asked Questions

UUID v4 is a randomly generated Universally Unique Identifier. It uses random values instead of timestamps or hardware information, making it simple, fast, and suitable for most applications requiring unique identifiers.
UUID v4 values are generated using random numbers. The chance of generating the same UUID twice is astronomically low, making collisions practically impossible in real-world applications.
No. All UUID v4 generation happens locally in your browser. No data is uploaded, stored, or transmitted to any server, ensuring full privacy.
No. This tool only generates UUID version 4, which is the most commonly used and recommended version for random unique identifiers.
No installation is required. The UUID v4 Generator works directly in modern browsers without extensions or downloads.