UUID Generator
Generate one or multiple cryptographically random UUID v4 identifiers instantly — no installation, no account required. UUIDs (Universally Unique Identifiers) are 128-bit labels used to uniquely identify records, sessions, transactions, files, and objects in software applications, databases, and APIs. UUID v4 uses random numbers, making collisions statistically impossible. Our generator lets you create anywhere from 1 to 100 UUIDs at once, copy them individually or in bulk, and download them as a text file. All generation happens in your browser using the secure Web Crypto API.
UUID Generator
Generate version 4 (random) UUIDs instantly.
UUIDs are version 4 (randomly generated) using the Web Crypto API
How to Use UUID Generator
- 1Set the quantity of UUIDs you want to generate (1 to 100)
- 2Click "Generate UUIDs" to create your unique identifiers
- 3Click on any UUID to copy it individually to your clipboard
- 4Use "Copy All" to copy the entire batch at once
- 5Click "Download" to save all UUIDs as a .txt file
About UUID Generator
Generate one or multiple cryptographically random UUID v4 identifiers instantly — no installation, no account required. UUIDs (Universally Unique Identifiers) are 128-bit labels used to uniquely identify records, sessions, transactions, files, and objects in software applications, databases, and APIs. UUID v4 uses random numbers, making collisions statistically impossible. Our generator lets you create anywhere from 1 to 100 UUIDs at once, copy them individually or in bulk, and download them as a text file. All generation happens in your browser using the secure Web Crypto API.
Your Privacy is Protected
UUID Generator runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hexadecimal characters (e.g., 550e8400-e29b-41d4-a716-446655440000). It is used in databases, APIs, and software to uniquely identify records without a central authority.
What is the difference between UUID v4 and other versions?
UUID v4 is randomly generated, making it the most common choice for general use. UUID v1 is time-based, v3 and v5 are hash-based from a namespace and name. UUID v4 is preferred when you need unique IDs without any embedded timestamp or namespace.
Can two generated UUIDs ever be the same?
The probability of a UUID v4 collision is astronomically low — roughly 1 in 5.3 × 10^36. For all practical purposes, each UUID v4 is guaranteed to be globally unique.
Is the generation cryptographically secure?
Yes. Our UUID generator uses window.crypto.getRandomValues(), the Web Cryptography API built into all modern browsers, which provides cryptographically strong randomness.
Why Use This Tool?
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