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UUID Generator

Bulk UUID / GUID Generator
Generate cryptographically secure Version 4 UUIDs (Universal Unique Identifiers) in bulk locally.

What is a UUID / GUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. Microsoft systems refer to this standard as a GUID (Globally Unique Identifier). The design intent of UUIDs is to enable distributed systems to generate unique identifiers without requiring central coordination, database increments, or network synchronization. The probability of generating duplicate keys is mathematically negligible, making them ideal for transaction records, session keys, and database primary keys.

Understanding UUID Version 4 vs Version 1

There are multiple sub-versions of the UUID standard, each generated using different seed values:

  • Version 4 (Random): Generated entirely using cryptographically secure random numbers. This is the industry standard for web tokens, transaction records, and generic database primary keys. A standard v4 UUID is structured as: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (where 4 represents version 4).
  • Version 1 (Time-based): Generated using the system host MAC address and a high-resolution timestamp. While useful for time-ordered lookups, it introduces minor privacy concerns since the generating host's network interface address is encoded inside the token.

How to Use the RTSALL Bulk UUID Generator

Generating custom formats is highly configurable:

  1. Set your desired **Quantity** of tokens (we support bulk generation up to 5,000 UUIDs per batch).
  2. Configure the formatting settings: choose whether to include hyphens, convert letters to uppercase, or wrap keys in braces {}.
  3. Select the **Output Wrap** mode: choose Line-by-Line for simple lists, JSON Array for config arrays, or SQL Insert List for quick database scripts.
  4. Click Generate UUIDs to calculate instantly.
  5. Copy the results to your clipboard or download them as a clean uuids.txt file.

Frequently Asked Questions (FAQ)

Q: Is there any risk of duplicate keys?
A: With UUID Version 4, the number of possible unique keys is 2122 (or approximately 5.3x1036). The chance of a collision is so infinitesimally small that it can be considered practically impossible in any real-world database scope.

Q: Are these UUIDs generated securely?
A: Yes! Our tool utilizes the browser-native, cryptographically secure random number generator (window.crypto.randomUUID) where available, falling back to RFC4122 random math scripts when run in older clients.

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